Direct Positive Material Patents (Class 430/940)
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Patent number: 6753121Abstract: A photoconductive material imaging element is described comprising a support and a silver halide emulsion imaging layer comprising silver halide grains which have not been chemically sensitized to optimize formation of latent image Agno, centers upon imagewise exposure and which are doped with at least 500 deep electron trapping agent dopant centers per grain. In accordance with a preferred embodiment, the photoconductive material imaging element includes a planar support and the non-chemically sensitized, deep electron trapping agent doped silver halide grains comprise tabular grains, preferably with an average grain size equivalent circular diameter of greater than 2 &mgr;m, with the long dimensions of the tabular grains primarily oriented parallel to the plane of the support.Type: GrantFiled: November 15, 2002Date of Patent: June 22, 2004Assignee: Eastman Kodak CompanyInventors: Lillian M. Kellogg, Joe E. Maskasky, Dale E. Hamilton
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Patent number: 6114104Abstract: A direct positive silver halide photographic light sensitive material is disclosed, having yellow, magenta and cyan image forming units, wherein at least one of the color image forming units contains at least two internal latent image forming silver halide emulsions which are different in a factor of contribution to image formation, a silver halide emulsion having a lower factor of contribution to image formation having a part common to sensitivity of a silver silver halide emulsion contained in one of the other two image forming units, and the photographic material is subjected to exposure, based on digitized image information.Type: GrantFiled: September 2, 1999Date of Patent: September 5, 2000Assignee: Konica CorporationInventors: Satoshi Masumi, Shigeo Tanaka
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Patent number: 6033833Abstract: A new fogging photographic processing solution for a reversal process comprises a compound (I) and a bi-nucleophilic agent. Compound (I) corresponds to the following formula: ##STR1## wherein A is a group capable of being adsorbed to the silver halide surface, L is a linking group and r is 0 or 1, R.sub.1 and R.sub.2 are independently selected from an alkyl group, substituted or unsubstituted, and an aryl group substituted or unsubstituted. A process of producing a positive image by imagewise exposure of a reversal silver halide material comprises contacting the material with the above fogging solution or by imagewise exposure of such a material containing a compound (I) and contacting the material with a solution comprising a bi-nucleophilic agent.Type: GrantFiled: April 29, 1999Date of Patent: March 7, 2000Assignee: Eastman Kodak CompanyInventors: Siu C. Tsoi, Peter J. Twist, David T. Southby
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Patent number: 5691121Abstract: A photographic light-sensitive silver halide material is provided for making negative lithographic images or direct-positive images, said material comprising a support, at least one internal latent image-type silver halide emulsion layer (in the case of direct-positive materials) or surface latent image-type silver halide emulsion layer (in the case of lithographic materials) and development-nucleating amounts of a compound or a precursor thereof, said compound having at least one quaternary heterocyclic ring system comprising at least three rings including a tetrahydropyridinium ring wherein carbon-nitrogen and carbon-carbon double bonds are also part of an aromatic ring being one of said three rings and wherein said double bonds and nitrogen atom in said tetrahydropyridinium ring are incorporated into annelated conjugated ring systems. Developing said photographic material after exposure in an alkaline surface developer rapidly converts said precursor into a ring system as defined hereinbefore.Type: GrantFiled: July 15, 1996Date of Patent: November 25, 1997Assignee: AGFA-Gevaert. N.V.Inventors: Jean-Marie Dewanckele, David Terrell, Hieronymus Andriessen, Kris Viaene
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Patent number: 5547828Abstract: A direct positive type silver halide photographic material is described, which contains at least one compound represented by the following formula (I) and at least one cyanine dye having a pyrazolo[5,1-b]quinazolone nucleus and a cyanine heterocycle nucleus, wherein a carbon atom at 3-position of the pyrazolo[5,1-b]quinazolone nucleus is bonded through a four-methine chain to an atom at the 2-position or 4-position of the cyanine heterocycle nucleus, provided that the 4-position is possible only when the cyanine heterocycle nucleus is a quinoline or pyridine nucleus: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents an alkyl group, an aryl group or a heterocyclic group, which may be substituted; V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5, V.sub.6, V.sub.7 and V.sub.8 each represents a hydrogen atom or a monovalent substituent; L.sub.1, L.sub.2 and L.sub.3 each represents a substituted or unsubstituted methine group; M.sub.1 represents a charge-neutralizing counter ion; and m.sub.Type: GrantFiled: January 17, 1995Date of Patent: August 20, 1996Assignee: Fuji Photo Film Co., Ltd.Inventors: Takanori Hioki, Toyohisa Oya, Shingo Nishiyama
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Patent number: 5523197Abstract: In order to provide a direct-positive material having low contrast and extended latitude that can be manufactured in a consistent and reproducable way a multilayer direct-positive photographic material is disclosed as well as the process to provide it, characterized by the steps of coating on one side of a support at least two layers of direct positive silver halide emulsions of the externally fogged type, at least one layer of which comprises a mixture of direct positive silver halide emulsions of the externally fogged type and at least one layer of which comprises one or more filter dyes; overcoating said emulsion layers with at least one protective layer; coating on the other side of the support at least one backing layer.Type: GrantFiled: April 12, 1995Date of Patent: June 4, 1996Assignee: Agfa-Gevaert, N.V.Inventor: Luc Heremans
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Patent number: 5492797Abstract: Disclosed is a direct positive silver halide color photographic light-sensitive material comprising a support and provided thereon, a blue-sensitive emulsion layer containing previously unfogged internal latent image-forming silver halide grains having a spectral sensitivity to blue-light, a green-sensitive emulsion layer containing previously unfogged internal latent image-forming silver halide grains having a spectral sensitivity to green-light, a red-sensitive emulsion layer containing previously unfogged internal latent image-forming silver halide grains having a spectral sensitivity to red-light and a hydrophilic colloidal layer, wherein said blue-sensitive emulsion layer is provided so as to be located farther than both said green-sensitive and said red-sensitive emulsion layers from the support; and at least one of said blue-sensitive emulsion layer, said-green sensitive emulsion layer and said red-sensitive emulsion layer or said hydrophilic colloidal layer contains an internal latent image forming siType: GrantFiled: July 22, 1994Date of Patent: February 20, 1996Assignee: Konica CorporationInventors: Yasuo Tosaka, Masayuki Sasagawa
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Patent number: 5449595Abstract: The present invention relates to a method for making direct-positive photographic images by developing light-sensitive materials in the presence of development nucleators which do not cause loss of sensitivity during exposure or unevenness of development. More specifically the invention relates to the formation of direct-positive images having a high maximum density and high exposure latitude and to photographic materials for use in said formation, which is accomplished by a method for making direct-positive images comprising:image-wise exposing a photographic light-sensitive silver halide material comprising a support and a layer of an internal latent image-type silver halide emulsion, the pAg of which has been adjusted to a pAg-value between 9.0 and 10.5 inclusive before coating, anddeveloping said exposed photographic silver halide material in a surface developer in the presence of a development nucleator with a group promoting adsorption to silver halide.Type: GrantFiled: June 29, 1994Date of Patent: September 12, 1995Assignee: Agfa-Gevaert, N.V.Inventors: Jean-Marie Dewanckele, David Terrell, Kris Viaene
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Patent number: 5338658Abstract: A silver halide photographic material which contains at least one compound represented by the following general formula (I) in at least one silver halide photographic emulsion layer or one hydrophilic colloid layer, whereby achieving high Dmax and low Dmin: ##STR1## wherein T, U, V, and W each represents CH or N; R.sup.1 represents a substituent group; R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represents a hydrogen atom or a substituent group, provided that at least one among the substituents of R.sup.2 to R.sup.6 represents a group to be eliminated in the form of R.sup.m --H (m=an integer from 2 to 6) under an alkaline condition; X represents a counter ion for adjusting the charge balance; n represents the number of counter ions necessary to adjust the charge balance; and further, any pair of adjacent groups among the substituents from R.sup.1 to R.sup.6 may combine with each other to form a ring.Type: GrantFiled: April 26, 1993Date of Patent: August 16, 1994Assignee: Fuji Photo Film Co., Ltd.Inventor: Shigeo Hirano
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Patent number: 5336590Abstract: A silver halide color photographic photosensitive material is disclosed which comprises a transparent support on which there are provided at least one cyan color forming coupler containing layer, at least one magenta color forming coupler containing layer, and at least one yellow color forming coupler containing layer, and at least one light-insensitive layer, wherein a compound represented by formula (I), a compound represented by formula (IIa) or (IIb) or both, and an internal latent image forming silver halide grain are contained in the photographic material: ##STR1## wherein Z.sup.11 represents a group of non-metal atoms which is required to form a five or six membered heterocyclic ring, and Z.sup.11 may be substituted with substituent groups; R.sup.11 is an aliphatic group; and R.sup.12 is a hydrogen atom, an aliphatic group or an aromatic group; R.sup.11 and R.sup.12 may be substituted with substituent groups; R.sup.12 may be joined to the heterocyclic ring completed by Z.sup.Type: GrantFiled: September 28, 1992Date of Patent: August 9, 1994Assignee: Fuji Photo Film Co., Ltd.Inventor: Akio Mitsui
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Patent number: 5314799Abstract: There is disclosed a method for preparing a direct reversal type silver halide light-sensitive emulsion which is used for a black-and-white light-sensitive material and has the improved photographic performances of a high sensitivity and a high contrast. The method comprises:A method for preparing a fogging type direct positive silver halide emulsion comprising the steps of:(a) forming an emulsion containing silver halide grains;(b) fogging surfaces of the grains with a reducing agent to form a silver nuclei; and then(c) performing at least one of an adjustment of pH of the emulsion to 4.5 or less and an adjustment of pAg of the emulsion to 8.1 or more.Type: GrantFiled: April 7, 1993Date of Patent: May 24, 1994Assignee: Fuji Photo Film Co., Ltd.Inventor: Yoshihiro Takagi
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Patent number: 5306608Abstract: A direct positive photographic light-sensitive material comprises a support and a light-sensitive emulsion layer provided thereon which contains non-pre-fogged internal latent image type silver halide grains of a core/shell structure. The cores of the silver halide grains are treated with a spectral sensitizing dye and a chemical sensitizer.Type: GrantFiled: October 19, 1992Date of Patent: April 26, 1994Assignee: Fuji Photo Film Co., Ltd.Inventor: Kiyokatsu Kato
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Patent number: 5283167Abstract: A direct-positive image-forming photographic material comprises a supporting substrate bearing a light sensitive, nonprefogged silver halide photographic emulsion capable of forming an internal latent image and includes a water-insoluble nucleator. The nucleator is incorporated in the photographic material in the form of a solid particle dispersion to improve the storage stability of the photographic material. The development rate of the photographic material may be increased by use of a developer containing an activator for the nucleator.Type: GrantFiled: January 30, 1992Date of Patent: February 1, 1994Assignee: Eastman Kodak CompanyInventors: Krishnan Chari, Douglas E. Corbin, Glenn M. Brown, Harry A. Hoyen
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Patent number: 5266448Abstract: A method for color reversal processing of an imagewise exposed silver halide color photographic material comprising first developing in a black-and-white developing bath, next color developing in a color developing bath, and then desilvering in a bath having a bleaching ability. The black-and-white developing bath has a bromide concentration in the range of 0.025 to 0.1 mol/l and is used for the black-and-white development. Furthermore, in a preferred embodiment, the photographic material comprises at least one silver halide emulsion layer containing a silver halide emulsion comprising silver halide grains having an average grain size of 0.3 .mu.m or less. In accordance with the invention, the maximum densities of the developed color images are increased without lowering of the sensitivity and contrast.Type: GrantFiled: March 27, 1992Date of Patent: November 30, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Sadanobu Shuto, Takatoshi Ishikawa
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Patent number: 5244776Abstract: A method of forming a color image in a silver halide color photosensitive material comprisingexposing the photosensitive material in a scanning exposure system for a time period shorter than about 10.sup.-4 second per picture element, and thereaftersubjecting the exposed material to development processing for a total processing time of about 90 seconds or less, inclusive of drying time,the photosensitive material comprising a support having thereon at least three silver halide emulsion layers differing in color sensitivity, at least two of which have a spectral sensitivity maximum in the wavelength region of about 670 nm or longer, wherein at least one of the silver halide emulsion layers comprises (a) at least one coupler capable of developing color upon coupling reaction with the oxidized form of an aromatic amine compound and (b) at least one compound of general formula (I) or (II): ##STR1## wherein the variables are as defined in the specification.Type: GrantFiled: February 5, 1991Date of Patent: September 14, 1993Assignee: Fuji Photo Film Co., Ltd.Inventor: Kiyoshi Kawai
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Patent number: 5221601Abstract: UV sensitive direct positive silver halide photographic material for duplicating processes which can be safely handled under roomlight conditions, said material comprising a support having thereon at least one silver halide emulsion layer comprising a prefogged direct positive silver halide emulsion, preferably one having a chloride content of at least 70 mole % and comprising internal electron traps, said emulsion layer or a hydrophilic colloid layer in water-permeable relationship to said emulsion layer containing at least one nitro-substitued indazole or benzimidazole derivative and at least one non-nitro-substituted indazole or benzimidazole derivative.Type: GrantFiled: September 16, 1991Date of Patent: June 22, 1993Assignee: Agfa-Gevaert, N.V.Inventors: Marc B. Graindourze, Marc H. Van Bockstaele
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Patent number: 5221593Abstract: The improved silver halide photographic material contains a novel nucleating compound that is useful either as a contrast increasing agent in light-sensitive material for use in photochemical processes or as a foggant in direct positive light-sensitive materials.Type: GrantFiled: March 7, 1991Date of Patent: June 22, 1993Assignee: Konica CorporationInventors: Akira Onodera, Yasushi Usagawa
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Patent number: 5213952Abstract: A method of forming a direct positive color image by imagewise exposing a photographic material having at least one emulsion layer which contains previously non-fogged internal latent image-type silver halide grains, on a support, followed by color-developing the exposed material during or after fogging thereof, wherein the photographic material contains a color sensitizing dye and at least one compound or salt thereof which satisfies the condition-1 as defined in the specification. With the image formed by the method having an elevated maximum image density with a lowered minimum image density, and with the iamge-forming method displaying extremely excellent color reproducibility.Type: GrantFiled: October 31, 1990Date of Patent: May 25, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeru Kuwashima, Akihiko Ikegawa
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Patent number: 5185240Abstract: Disclosed is an autopositive silver halide photographic material which comprises at least one silver halide emulsion layer, characterized in that said emulsion layer or at least one other hydrophilic colloid layers contains at least one compound selected from the group consisting of compounds represented by the following general formulas (1), (2) and (3): ##STR1## wherein R.sub.1 represents hydrogen atom or an alkyl group; and R.sub.2, R.sub.3 and R.sub.4 each represents hydrogen atom, a halogen atom, an alkyl group or an alkoxy group; ##STR2## wherein R.sub.5 represents hydrogen atom or an alkyl group; and R.sub.6 and R.sub.7 each represents hydrogen atom, an alkyl group, a halogen atom or an aryl group; ##STR3## wherein R.sub.8 represents a lower alkylene group; X represents a halogen atom, nitro group, hydroxy group, a cyano group, a lower alkyl group, a lower alkoxy group, ##STR4## or --SO.sub.3 M; R.sub.12 represents hydrogen atom, --OM, a lower alkyl group, a lower alkoxy group or ##STR5## R.sub.Type: GrantFiled: August 10, 1990Date of Patent: February 9, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Junji Miyata, Satoshi Kanetake, Yasufumi Morimoto, Kenji Hanayama
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Patent number: 5166043Abstract: Photographic light-sensitive silver halide material for forming direct-positive images comprising a support, a light-sensitive emulsion layer comprising unfogged internal latent image-type silver halide grains dispersed in a hydrophilic colloid binder and comprising a development nucleator, and at least one protective hydrophilic colloid layer, wherein said light-sensitive emulsion comprises at least one compound that during the development of said material in a surface developer provides iodide ions, the weight ratio of the hydrophilic colloid binder of said emulsion layer to silver halide expressed as silver nitrate ranging from 0.4:1 to 3:1, and said protective hydrophilic colloid layer having a thickness in dry state of 1 to 3 .mu.m. The present invention also relates to a method for making direct-positive images with such a photographic light-sensitive silver halide material.Type: GrantFiled: July 19, 1991Date of Patent: November 24, 1992Assignee: Agfa-Gevaert, N.V.Inventor: Jozef P. De Prijcker
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Patent number: 5147754Abstract: A silver halide photographic material which provides a negative image contains a compound represented by formula (I): ##STR1## wherein R represents an aliphatic group, an aromatic group, or a heterocyclic group; Z represents a development inhibitor group containing an anionic functional group as a partial structure; "Time" represents a divalent group; and n is 0 or 1.Type: GrantFiled: August 7, 1991Date of Patent: September 15, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Hisashi Okamura, Hisashi Okada, Morio Yagihara, Kazunobu Katoh
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Patent number: 5110719Abstract: A process for preparing a direct positive photosensitive material comprising providing on a support at least one silver halide light-sensitive emulsion layer containing the combination of (a) non-prefogged internal latent image silver halide grains; (b) a binder; (c) at least one compound represented by formulae (I), (II), or (III); and at least one compound represented by formula (IV):R--SO.sub.2 S--M (I)R--SO.sub.2 S--R.sup.1 (II)R--SO.sub.2 S--L.sub.m --S.O.sub.2 S--R.sup.2 (III)wherein R, R.sup.1 and R.sup.2 each represents a substituted or unsubstituted aliphatic group, a substituted or unsubstituted aromatic group or a substituted or unsubstituted heterocyclic group; M represents a cation; L represents a divalent linking group; and m is 0 or 1; andR.sup.3 --SO.sub.2 --M.sup.1 (IV)wherein R.sup.3 represents an aliphatic group, an aromatic group or a heterocyclic group; and M.sup.1 represents a cation. The material provides a direct positive image with high Dmax, low Dmin and high contrast.Type: GrantFiled: November 13, 1990Date of Patent: May 5, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Sadanobu Shuto, Hatsumi Tanemura, Shigeo Hirano
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Patent number: 5100761Abstract: A silver halide photographic material comprising one or more silver halide emulsion layers and hydrophilic colloid layers, wherein at least one of the layers contains an acylhydrazine compound as described below. The instant photographic materials have high contrast negative-gradation or positive-gradation characteristics, high maximum image density, excellent reversal characteristics and long-term storage stability.Type: GrantFiled: March 21, 1988Date of Patent: March 31, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Morio Yagihara, Hisashi Okada, Kazunobu Katoh, Noriyuki Inoue, Shingo Nishiyama, Tetunori Matushita
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Patent number: 5091295Abstract: 'A positive-positive silver halide color photographic material comprising at least one red-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer, at least one blue-sensitive silver halide emulsion layer, at least one hydrophilic colloid layer, and at least one colloidal silver layer on a support wherein said silver halide emulsion layer, hydrophilic colloid layer, or colloidal silver layer contains at least one dye of formula (I): ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and each represents an alkyl group, an aryl gorup or a heterocyclic group; L.sub.1, L.sub.2 and L.sub.3 each represents a methine group; n.sub.1 represents 1 or 2; and any of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 has a sulfo group and the total of the groups is at least two or more. A method of forming a color image using the same is also disclosed.Type: GrantFiled: September 20, 1990Date of Patent: February 25, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeru Kuwashima, Mario Aoki
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Direct positive silver halide photographic light-sensitive material and a processing method therefor
Patent number: 5049483Abstract: There is disclosed a direct positive silver halide light-sensitive material which can be processed in ultra-rapid processing and have a higher sensitivity, a lower Dmin, an excellent antistatic property and less flactuation of the properties in storing. The light-sensitive material contains an electron-accepting compound in a silver halide emulsion layer, and a fluorinated surfactant and/or at least one of the compounds represented by Formulas I-a to II-b in a photographic component layer: ##STR1## wherein R.sub.1 to R.sub.4 represent independently a hydrogen atom, a lower alkyl group, an alkoxy group, a carboxy group, an alkoxycarbonyl group, a sulfo group, a halogen atom, and a nitro group, provided that at least one of R.sub.1 and R.sub.2 is a carboxy group, an alkoxycarbonyl group or a sulfo group.Type: GrantFiled: June 4, 1990Date of Patent: September 17, 1991Assignee: Konica CorporationInventors: Naoko Yatsuyanagi, Tsuyoshi Mitsuhashi -
Patent number: 5043259Abstract: A pre-fogged direct positive silver halide emulsion comprising silver halide grains which have been formed in the presence of a compound represented by the following formula (I):R--SO.sub.2 --M (I)wherein R represents an aliphatic group, an aromatic group or a heterocyclic group, and M represents a hydrogen atom or a cation. The invention also relates to a method for making such a photographic material.Type: GrantFiled: May 24, 1990Date of Patent: August 27, 1991Assignee: Fuji Photo Film Co., Ltd.Inventor: Naoki Arai
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Patent number: 5037726Abstract: A method for forming a direct positive image having a high Dmax and a low Dmin, which comprises image-wise exposing a photographic light-sensitive material having on a support at least one photographic emulsion layer containing unprefogged internal latent image-type silver halide grains and developing the photographic light-sensitive material after or while fogging to form direct positive image, wherein the aforesaid development is performed in the existence of at least one compound selected from the group consisting of compounds represented by formula (I), (II), (III), (IV), (V) or (VI), acid salts of compounds represented by formula (I) to (IV) provided substituents thereof contain an amino group, and acid salts of compound represented by formula (V) or (VI); ##STR1## wherein symbols are defined as in claim 1.Type: GrantFiled: December 7, 1988Date of Patent: August 6, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Tetsuro Kojima, Noriyuki Inoue
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Patent number: 5035984Abstract: A method for forming a direct positive image by the steps of:(a) imagewise exposing a photosensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer containing non-prefogged silver halide grains capable of forming an internal latent image; at least one of the light-sensitive emulsion layer or the other hydrophilic colloidal layer of the photosensitive material containing the following compound (a): ##STR1## (b) developing the exposed material in the presence of a developing agent and at least one nucleating agent; and(c) at least one of fixing and bleaching said developed photosensitive material to form a positive image.When used for making computer output images, the method according to the present invention provides rapid and stable formation of direct positive images with a high Dmax and a low Dmin, and prevents re-reversal negative formation during high illuminance exposure.Type: GrantFiled: November 6, 1989Date of Patent: July 30, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunoi Hayashi, deceased, Masahiro Hayashi, legal representative, Masako Hayashi, legal representative
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Patent number: 5030553Abstract: Disclosed are direct positive photographic photosensitive materials which have at least one internal latent image core/shell type silver halide emulsion layer, which has not been pre-fogged, on a support wherein the silver halide molar ratio of the core and shell of the emulsion is not more than 1/5, and wherein at least one type of compound which can be represented by the formula (N-I) indicated below is included in the photosensitive material. ##STR1## In this formula, Z represents a non-metal atomic group which is required to form a 5- or 6-membered heterocyclic ring, and Z may be substituted with substituents. R.sup.1 is an aliphatic group, and R.sup.2 is a hydrogen atom, an aliphatic group or an aromatic group. R.sup.1 and R.sup.2 may be substituted with substituents. Furthermore, R.sup.2 may be joined to the heterocyclic ring which is completed by and form a ring. However, at least one of the groups represented by R.sup.1, R.sup.Type: GrantFiled: January 31, 1990Date of Patent: July 9, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeru Kuwashima, Shigeo Hirano
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Patent number: 5015561Abstract: A method of forming a direct positive image comprising:(a) imagewise exposing a direct positive silver halide photographic material composed of a support having thereon at least one light-sensitive silver halide emulsion layer containing non-prefogged internal latent image silver halide grains, at least one hydrophilic colloidal layer of the material containing a nucleating agent, and at least one sensitizing dye represented by formulae (I), (Ia), (Ia'), or (Ib): ##STR1## wherein Z and Z.sub.1 each represents a non-metallic atomic group necessary for forming a 5-membered or 6-membered nitrogen-containing heterocyclic ring; R and R.sub.1 each represents a substituted or unsubstituted alkyl group or an aryl group; Q and Q.sub.1 represent a non-metallic atomic group necessary for forming together a 4-thiazolidinone group, a 5-thiazolidinone group or a 4-imidazolidinone group; L, L.sub.1 and L.sub.2 each represents a methine group or a substituted methine group; n.sub.1 and n.sub.Type: GrantFiled: March 6, 1989Date of Patent: May 14, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunori Hayashi, Nobuaki Inoue, Shingo Nishiyama
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Patent number: 4994364Abstract: A direct positive image forming method comprising development processing an imagewise exposed direct positive photographic light-sensitive material which comprises a support having thereon at least one layer containing internal latent image type silver halide grains not having been previously fogged after fogging treatment or while fogging treatment, wherein the fogging treatment is conducted in the presence of a compound represented by the following general formula (I): ##STR1## wherein A.sub.1 and A.sub.2 both represent a hydrogen atom or one of A.sub.1 and A.sub.2 represents a hydrogen atom and the other represents a sulfonyl group or an acyl group; G.sub.1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, ##STR2## or an iminomethylene group; L.sub.1 represents a divalent linkage group; X.sub.1 represents --O-- or ##STR3## wherein R.sub.4 represents a hydrogen atom, an alkyl group or an aryl group); Y.sub.1 represents ##STR4## R.sub.1 and R.sub.Type: GrantFiled: August 15, 1989Date of Patent: February 19, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Noriyuki Inoue, Morio Yagihara
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Patent number: 4968596Abstract: A method for forming a direct positive image comprising the steps of:(a) imagewise exposing a photographic light-sensitive material composed of a support having thereon at least one unprefogged internal latent image type silver halide light-sensitive emulsion layer; and(b) developing the exposed photographic light-sensitive material to form a direct positive image in the presence of at least one nucleating agent represented by formula (N-I); ##STR1## wherein Z.sup.1 represents nonmetal atomic group necessary for forming a 5-membered or 6-membered heterocyclic ring, a 5-membered or 6-membered heterocyclic ring fused with an aromatic ring, or a 5-membered or 6-member heterocyclic ring fused with another heterocyclic ring; R.sup.1 represents an aliphatic group; X represents ##STR2## Q represents a nonmetallic atomic group necessary for forming a 4-membered to 12-membered nonaromatic hydrocarbon ring or a 4-membered to 12-membered nonaromatic heterocyclic ring; provided that at least one of R.sup.1, Z.sup.Type: GrantFiled: November 2, 1988Date of Patent: November 6, 1990Assignee: Fuji Photo Film Co. Ltd.Inventors: Noriyuki Inoue, Shigeo Hirano, Tetsuro Kojima, Mitsura Yamamoto, Satoshi Nagaoka
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Patent number: 4968592Abstract: A direct positive image forming method comprising development processing an imagewise exposed photographic light-sensitive material comprising a support having thereon at least on photographic emulsion layer containing internal latent image type silver halide grains not having been previously fogged in the presence of a nucleating agent, wherein the nucleating agent comprises at least two kinds of nucleating agents and a ratio of nucleating rates thereof is at least 2.0.In accordance with the method of the present invention, images having both a low minimum density and an extremely high maximum density can be rapidly and stably obtained using a small amount of nucleating agents.Type: GrantFiled: September 30, 1988Date of Patent: November 6, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Naoyasu Deguchi, Satoshi Nagaoka, Noriyuki Inoue, Shigeo Hirano
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Patent number: 4954427Abstract: A process for the formation of direct positive images comprising (1) imagewise exposing to light, a light-sensitive material comprising a photographic emulsion layer containing unfogged internal latent image type silver halide particles on at least one support, and (2) developing the light-sensitive material in the presence of a nucleating agent and at least one nucleation accelerator of general formula (I):A--(Y).sub.n R].sub.m (I)wherein A represents a group which is adsorbed by a silver halide; Y represents a divalent linkage group consisting of atoms or atomic groups selected from the group consisting of a hydrogen atom, a carbon atom, a nitrogen atom, an oxygen atom, and a sulfur atom; R represents an organic group containing at least one of a thioether group, an amino group, an ammonium group, an ether group, and a heterocyclic group; n represents an integer of 0 or 1; and m represents an integer of 1 or 2 to form direct positive images.Type: GrantFiled: June 12, 1987Date of Patent: September 4, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Noriyuki Inoue, Tetsuro Kojima, Tatsuo Heki, Shigeo Hirano
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Patent number: 4946629Abstract: (i) A compound of the formula: ##STR1## wherein R is H, a metal or a group containing a tetravalent N atom;X is ##STR2## R.sup.1 is NO.sub.2, CN or COOY; Y is H, C.sub.1-4 -alkyl, a metal or a group containing a tetravalent N atom;R.sup.2 & R.sup.3 are each independently H or a non-hydrophilic aliphatic or cycloaliphatic group containing up to 30 carbon atoms;R.sup.4 & R.sup.5 are each independently H or a non-hydrophilic aliphatic or cycloaliphatic group containing up to 30 carbon atoms;and R.sup.6 & R.sup.7 are each independently H or a non-hydrophilic group containing up to 4 carbon atoms;or R.sup.4 & R.sup.6 together comprise ring fused to Ring A and R.sup.5 & R.sup.7 are as hereinbefore defined;or R.sup.5 & R.sup.7 together comprise ring fused to Ring A and R.sup.4 & R.sup.6 are as hereinbefore defined;or R.sup.2 & R.sup.4 together with the N atom to which R.sup.2 is attached from a ring fused to Ring A and R.sup.3 & R.sup.5 are as hereinbefore defined;or R.sup.3 & R.sup.Type: GrantFiled: November 25, 1988Date of Patent: August 7, 1990Assignee: Imperial Chemical Industries, PlcInventors: Simon Allen, Paul F. Gordon, Richard A. Hann
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Patent number: 4939013Abstract: Optical information active layer mainly composed of a quaternary system of Te-Ge-Sn-Au, with composition ratios of Te, Ge and Sn that lie within an area represented by points A B C D and E on FIG. 1, with an additional amount of Au that is 1-40 atomic % of the quaternary system of Te-Ge-Sn-Au. The optical information active layer can be melted readily by a laser diode thereby achieving a high recording sensitivity, because it contains Te.sub.2 Au alloy having low melting point, CHR and erasability after repeated use and long term storage are small, and since excessive Te in the information active layer is stabilized by formings of Ge Te Su Te and Au Te.Type: GrantFiled: March 9, 1989Date of Patent: July 3, 1990Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kunio Kimura, Noboru Yamada, Susumu Sanai, Eiji Ohno
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Patent number: 4904580Abstract: A direct positive silver halide photographic light sensitive material including a support having thereon at least one silver halide emulsion layer containing internal latent image silver halide grains, each of the grains comprising a core/shell structured particle comprising a core, at least one intermediate layer, and an outermost layer formed thereon. The outermost layer consists essentially of silver chloride which accounts for no more than 10 mol % of the silver halide in the internal latent image silver halide grain. Such photographic materials display an increased sensitivity while maintaining an adequate image density.Type: GrantFiled: April 15, 1988Date of Patent: February 27, 1990Assignee: Konishiroku Photo Industry Co., Ind.Inventors: Hajime Komatsu, Susumu Ohkawachi, Fujitsugu Suzuki
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Patent number: 4898807Abstract: A method for forming a direct positive color image by subjecting an inner latent image type light-sensitive silver halide color photographic material for formation of a direct positive color image, having at least one light-sensitive emulsion layer containing inner latent image type silver halide grains which have not been previously fogged on the grain surfaces to color developing processing after image exposure, which comprises developing an inner latent image type light-sensitive silver halide color photographic material for formation of a direct positive color image wherein a silver halide emulsion in at least one light-sensitive emulsion layer consists substantially of a silver chlorobromide emulsion with the use of a color developing solution containing an N-hydroxyalkyl-substituted-p-phenylenediamine derivative at 30.degree. C. or higher for not longer than 150 seconds.Type: GrantFiled: May 1, 1989Date of Patent: February 6, 1990Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Kazuhiro Kobayashi, Shigeharu Koboshi, Kazuyoshi Miyaoka
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Patent number: 4880727Abstract: A direct positive photographic material comprising a support having provided thereon one or more hydrophilic colloid containing layers, wherein at least one of said hydrophilic colloid containing layers is an internal latent image type silver halide emulsion which has not been previously fogged and at least one of said emulsion layer or other hydrophilic colloid containing layer contains a colloidal metal or a colloidal water-insoluble metallic sulfide, selenide or telluride, and a method for forming a direct positive from the direct positive photographic material in which a light-sensitive material contains at least two layers containing colloidal silver.Type: GrantFiled: September 28, 1987Date of Patent: November 14, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Noriyuki Inoue, Tatsuo Heki
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Patent number: 4877723Abstract: A silver halide photographic material which comprises a support having provided thereon at least one photosensitive silver halide photographic emulsion layer, wherein the emulsion layer or at least one of the other hydrophilic colloid layers contains at least one of alkynyl-substituted heterocyclic quaternary ammonium salts represented by the formula: ##STR1## wherein Z represents a group of non-metallic atoms required to form a 5- to 6-membered heterocyclic ring, R.sup.1 represents an aliphatic group, R.sup.2, R.sup.3 and R.sup.4, which may be the same or different, each represents a hydrogen atom, an aliphatic group, or an aromatic group, at least one of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and Z has at least one substituent having an alkynyl group, Y represents a counter ion for the charge balance, and n is a number required for charge balance.Type: GrantFiled: November 6, 1987Date of Patent: October 31, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeo Hirano, Noriyuki Inoue, Tatsuo Heki
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Patent number: 4871653Abstract: A process for forming a direct-positive image by developing an imagewise exposed photosensitive material, having on a support at least one photographic emulsion layer containing nonprefogged silver halide grains capable of forming an internal latent image, in which development is carried out in the presence of a combination of a nucleating agent and at least one compound having at least one mercapto group selected from a tetrazaindene, a triazaindene, and a pentaazaindene. The hydrogen atom of which mercapto group may optionally be further substituted with an alkali metal atom or an ammonium group. The invention process provides rapid and consistent formation of direct-positive images having high maximum density and low minimum density.Type: GrantFiled: June 30, 1987Date of Patent: October 3, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Noriyuki Inoue, Tatsuo Heki, Tetsuro Kojima
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Patent number: 4868102Abstract: A light-sensitive silver halide direct-positive photographic material which comprises a support and, provided thereon a light-sensitive direct-positive silver halide emulsion layer containing silver halide grains having an internal latent image and a core-shell structure comprising a core and at least one shell stratum either partly or entirely covering said core, the outermost stratum of said shell having been formed in the presence of a nitrogen-containing heterocyclic compound having a mercapto group therein.Type: GrantFiled: February 2, 1988Date of Patent: September 19, 1989Assignee: Konica CorporationInventors: Keiji Ogi, Atsushi Kamitakahara, Eiichi Sakamoto, Nariko Isozaki
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Patent number: 4863845Abstract: In an internal latent image type direct positive silver halide emulsion containing core/shell type silver halide grains wherein at least light-sensitive sites of the silver halide internal core which has been subjected to doping with metal ions or chemical sensitization, or both, is covered with a silver halide outer shell, the improvement wherein a photographic additive which is adsorbed on silver halide in said emulsion or interacts with silver ion, said additive being a compound which functions to change the crystal form or particle size of the silver halide grains in the case of the formation thereof or acts as a sensitizer or a sensitizing assistant in the case of chemically sensitizing the core particles but has a harmful influence on photographic properties if it remains after use of it, is deactivated by a deactivator prior to completion of the formation of said core/shell type silver halide grains or completion of surface chemical ripening of said grains.Type: GrantFiled: August 6, 1987Date of Patent: September 5, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Ashita Murai, Hiroyuki Mifune, Tatsuo Heki
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Patent number: 4859579Abstract: A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide photographic emulsion layer, wherein at least one layer selected from the emulsion layer and other hydrophilic colloid layers contains at least one alkynyl substituted heterocyclic quaternary ammonium salt represented by the following general formula (I): ##STR1## wherein Z represents a non-metallic atomic group necessary to form a substituted or unsubstituted 5-membered or 6-membered heterocyclic ring to which a aromatic ring or a heterocyclic ring may further be condensed; R.sup.1 represents a substituted or unsubstituted aliphatic group; X represents ##STR2## Q represents a non-metallic atomic group necessary to form a substituted or unsubstituted 4-membered to 12-membered non-aromatic hydrocarbon ring or substituted or unsubstituted non-aromatic heterocyclic ring; at least one of R.sup.Type: GrantFiled: January 28, 1988Date of Patent: August 22, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeo Hirano, Tetsuro Kojima, Mitsuru Yamamoto, Noriyuki Inoue, Tatsuo Heki
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Patent number: 4840879Abstract: The present invention relates to a process for forming a direct positive color image comprising(a) imagewise exposing a direct positive photosensitive silver halide color photographic material to light to yield an imagewise exposed material, said photographic material having a support and at least one silver halide emulsion layer thereon, said emulsion layer containing a coupler and internal latent image type silver halide crystals whose surfaces have not been fogged prior to said imagewise exposure, and(b) uniformly exposing to light the entire surface of said imagewise exposed photographic material before or during a development step and in the presence of a substance of Formula IV, a compound of formula I and a color-developing agent consisting of aromatic primary amino compounds selected from the group consisting of N-methyl-aminophenol, 4-amino-3-methyl-N-ethyl-N-(-methanesulfonamidoethyl) aniline,4-amino-3-methyl-N-ethyl-N-(-hydroxyethyl) aniline, 4-amino-3-methyl-N, N-diethyl-p-phenylenediamine, and 4-Type: GrantFiled: January 29, 1988Date of Patent: June 20, 1989Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Atushi Kamitakahara, Keiji Ogi
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Patent number: 4839271Abstract: A fogged direct positive photographic silver halide emulsion containing a sensitizing amount of at least one cyanine dye defined above, e.g., cyanine dye containing a 1-phenylindole nucleus substituted in the 2-position with the 3-pyridyl group. The said cyanine dye is also covered. The dye useful in sensitizing the silver halide emulsion useful for fogged direct-positive films.Type: GrantFiled: June 26, 1987Date of Patent: June 13, 1989Assignee: E. I. Du Pont de Nemours and CompanyInventor: Thomas D. Weaver
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Patent number: 4820625Abstract: A direct positive silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer comprising a prefogged direct-positive silver halide emulsion, preferably one having a chloride content of at least 70 mol%, said emulsion layer or a hydrophilic colloid layer adjacent to said emulsion layer containing at least one compound represented by the following general formula (I) and, optionally, a specified organic desensitizer, ##STR1## wherein Z.sub.Type: GrantFiled: September 21, 1987Date of Patent: April 11, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Naomi Saeki, Nobuaki Inoue, Toshinao Ukai, Yuji Mihara
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Patent number: 4818663Abstract: A radiation-sensitive element suitable for the preparation of half-tone color proofs comprising a substrate bearing at least four separate positive acting imaging media coated thereon, said imaging media including:(1) an imaging medium capable of forming a yellow image upon imagewise exposure and processing,(2) an imaging medium capable fo forming a magenta image upon imagewise exposure and processing,(3) an imaging medium capable of forming a cyan image upon imagewise exposure and processing, and(4) an imaging medium capable of forming a black image or a balancing black image upon imagewise exposure and processing,each imaging medium (1), (2) and (3) having a maximum spectral sensitivity at a wavelength different from that of the maxiumu sensitivity of the other imaging medium of (1) to (3), the imaging medium (4) having spectral sensitivity at each of the wavelengths of the maximum sensitivity of the other imaging media.Type: GrantFiled: April 2, 1987Date of Patent: April 4, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventors: Stephen R. Powers, Thomas D. G. Hellings
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Patent number: 4804747Abstract: (i) A compound of the formula: ##STR1## wherein R is H, a metal or a group containing a tetravalent N atom;X is S, O, ##STR2## R.sup.1 is NO.sub.2, CN or COOY; Y is H, C.sub.1-4 -alkyl, a metal or a group containing a tetravalent N atom;R.sup.2 and R.sup.3 are each independently H or a non-hydrophilic aliphatic or cycloaliphatic group containing up to 30 carbon atoms;R.sup.4 and R.sup.5 are each independently H or a non-hydrophilic aliphatic or cycloaliphatic group containing up to 30 carbon atoms; andR.sup.6 and R.sup.7 are each independently H or a non-hydrophilic group containing up to 4 carbon atoms; orR.sup.4 and R.sup.6 together comprise ring fused to Ring A and R.sup.5 and R.sup.7 are as hereinbefore defined; orR.sup.5 and R.sup.7 together comprise ring fused to Ring A and R.sup.4 and R.sup.6 are as hereinbefore defined; orR.sup.2 and R.sup.4 together with the N atom to which R.sup.2 is attached form a ring fused to Ring A and R.sup.3 and R.sup.5 are as hereinbefore defined; orR.sup.3 and R.sup.Type: GrantFiled: October 16, 1986Date of Patent: February 14, 1989Assignee: Imperial Chemical Industries PLCInventors: Simon Allen, Paul F. Gordon, Richard A. Hann
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Patent number: 4769316Abstract: A restraining method for restraining the formation of a re-reversal negative image is described, comprising incorporating a cyanine dye or a merocyanine dye which is electron donative and is adsorbable on silver halide in at least one hydrophilic colloid layer of an internal latent image type direct positive silver halide photographic material as a re-reversal restrainer.Type: GrantFiled: June 18, 1986Date of Patent: September 6, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Tsutomu Miyasaki, Shigeo Hirano, Kiyoshi Morimoto