Containing Developer In Element Patents (Class 430/405)
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Patent number: 5030542Abstract: A light-sensitive material which comprises a light-sensitive layer and a support is disclosed. The light-sensitive layer contains silver halid grains, at least two hydrazine derivatives and a polymerizable compounds. One hydrazine derivative has the following formula [I]: ##STR1## in which one of R.sup.1 and R.sup.2 is hydrogen, and the other is hydrogen, an alkylsulfonyl group, an arylsulfonyl group or an acyl group; R.sup.3 is an aliphatic group, an aromatic group or a heterocyclic group; R.sup.4 is hydrogen, an alkyl group, an aralkyl group, an aryl group, an alkoxy group, an aryloxy group, amino or carbamoyl; at least one hydrogen atom contained in R.sup.3 or R.sup.4 is replaced with a group capable of being adsorbed on silver halide grains; G is carbonyl, sulfonyl, sulfinyl, ##STR2## (R.sup.5 has the same meanings as for R.sup.4); and each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and G may have one or more substituent groups.Type: GrantFiled: July 27, 1989Date of Patent: July 9, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Koichi Nakamura, Morio Yagihara
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Patent number: 5017456Abstract: A silver halide photographic material which comprises a support having thereon at least one hydrophilic colloid layer, wherein at least one hydrophilic colloid layer is a silver halide photographic emulsion layer, and at least one hydrophilic colloid layer contains 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 is a hydrogen atom and the other is a sulfonyl group or an acyl group; R.sub.1 represent an aliphatic group or an aromatic group; Y.sub.1 represents a divalent linking group; G.sub.1 represents a carbonyl group, a sulfonyl group, a sulfinyl group, a sulfoxy group, a group of ##STR2## wherein R.sub.2 is an alkoxy group or an aryloxy group, a group of ##STR3## or an iminomethylene group; and Z.sub.1 represents a residue of a nitrogen-containing heterocyclic ring.Type: GrantFiled: January 26, 1990Date of Patent: May 21, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Hisashi Okamura, Kazunobu Katoh
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Patent number: 4965177Abstract: Potassium iodide (or a related iodide) when incorporated in an alkaline activator for use in a rapid access processor using developer-incorporated, resin-coated paper, (i) produces a cold image tone in black-and-white photographic prints, and (ii) maintains the image tone of a large number of prints within a narrow image tone range over a (one week or one thousand 8.times.10 inch print) design life of the activator solution.Type: GrantFiled: August 2, 1989Date of Patent: October 23, 1990Assignee: Eastman Kodak CompanyInventor: Donald F. McLaen
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Patent number: 4705738Abstract: In a silver halide photographic material for tanning development, comprising a support base coated with a substantially unhardened hydrophilic binder layer including a light-sensitive silver halide emulsion reactively associated with a tanning developer and a dispersion of colloidal silver, the tendency of the hydrophilic binder to become water-insoluble during storage can be prevented by adjusting the pAg of the colloidal silver dispersion to values in the range from 6.5 to 9.5 with a 1-phenyl-5-mercaptotetrazole compound before coating.Type: GrantFiled: March 11, 1986Date of Patent: November 10, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventor: Luciano Balestra
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Patent number: 4699868Abstract: An alkaline aqueous tanning developing solution for photographic image development comprising at least one hydroxylamine derivative. Preferred formulations may also contain at least one water-miscible polyhydroxy aliphatic organic solvent and/or a developing agent which comprises a polyhydroxybenzene compound having at least two hydroxy groups and at least one electron withdrawing and good leaving group suitable for nucleophilic addition.Type: GrantFiled: August 18, 1986Date of Patent: October 13, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventor: Gebran J. Sabongi
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Patent number: 4636456Abstract: A process for forming photographic image is disclosed, comprising photographically developing, in the presence of a polyalkylene oxide compound, a silver halide photographic light-sensitive material including at least one silver halide emulsion layer and containing in at least said emulsion layer or other hydrophilic layer a compound represented by formula (I). ##STR1## wherein: A and A' each represents a hydrogen atom or an alkalihydrolyzable group;R.sub.1, R.sub.2, and R.sub.3 each represents a group capable of substituting a hydrogen atom on the hydroquinone nucleus, with R.sub.2 and R.sub.3, A and R.sub.1, or A and R.sub.2 together form a ring; andX represents a group which shows a development-inhibiting effect after being released.Type: GrantFiled: May 7, 1985Date of Patent: January 13, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiro Takahashi, Koki Nakamura
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Patent number: 4629683Abstract: A method of processing a photographic material which contains a light-sensitive silver halide emulsion layer having associated therewith a blocked photographic agent capable of releasing a photographically useful agent by ring cleavage of a 4- to 7-membered ring containing at least one carbonyl group in the presence of a hydroxylamine, whereby both high stability of the photographic material upon storage and timely release of the photographically useful agent upon processing are achieved.Type: GrantFiled: April 20, 1984Date of Patent: December 16, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Isamu Itoh, Mitsunori Ono, Keiji Mihayashi, Seiji Ichijima, Hidetoshi Kobayashi
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Patent number: 4598040Abstract: There is provided a developer for use in a one-step process for the development of exposed film resulting in an exposurewise pattern of silver particles which are large enough to be used as printing elements in ink-printing techniques, providing a wide range of densities in the developed film. The developer is based on a buffered system of a developing agent, a sulfinic acid salt of the type HO-R-SO.sub.2.M..times.H.sub.2 O where R is a hydrocarbyl group and M is a cation, and a formaldehyde source, with conventional adjuvants such as anti-fogging agents and the like. Instead of the sulfinic acid salt defined above there may be used any compound which upon dissociation in a aqueous medium results in the same active ionic species.Type: GrantFiled: September 12, 1983Date of Patent: July 1, 1986Inventors: Yoel Netz, Arnold Hoffman
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Patent number: 4544620Abstract: A photographic element for use in a method of multicolor image formation by tanning development is a layered structure comprising an optionally primed base support, a layer of colloidal silver, a layer of sensitized silver halide emulsion in gelatin free of hardener, and at least one colored pigment or dye dispersed therein which absorbs radiation.Type: GrantFiled: May 25, 1984Date of Patent: October 1, 1985Assignee: Minnesota Mining and Manufacturing CompanyInventor: Michael T. Macioch
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Patent number: 4493888Abstract: A silver halide photographic light-sensitive material containing a diffusion resistant coupler, a light-sensitive silver halide and at least one organic metal complex represented by the following general formula (I) in the same layer or different layers on a support. ##STR1## wherein M represents a divalent metal atom; R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl group having from 1 to 5 carbon atoms, a hydroxyalkyl group having from 1 to 5 carbon atoms, an alkoxyalkyl group having from 2 to 10 carbon atoms or an alkylsulfonamidoalkyl group having from 2 to 10 carbon atoms, or R.sup.1 and R.sup.2 may be bonded each other to form a heterocyclic ring together with the nitrogen atom; R.sup.3, represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms or an alkoxy group having from 1 to 5 carbon atoms; and R.sup.4 and R.sup.Type: GrantFiled: July 15, 1983Date of Patent: January 15, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsusuke Endo, Eiichi Kato, Nobutaka Ohki, Takatoshi Ishikawa
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Patent number: 4480027Abstract: A photographic recording material for the production of color images to be viewed by reflected light contains, on a transparent support layer at least 60 .mu.m in thickness with smooth surfaces, a plurality of silver halide emulsion layers with differing spectral sensitivities and color couplers associated therewith and a light reflective opaque layer of binder. The material is developed chromogenically from the coated side. Exposure and viewing are carried out through the transparent support layer.Type: GrantFiled: November 3, 1982Date of Patent: October 30, 1984Assignee: Agfa-Gevaert AktiengesellschaftInventors: Erwin Sch/o/ n, Karl-Wilhelm Schranz, Erich Wolff
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Patent number: 4473635Abstract: A silver halide photographic light-sensitive material containing a diffusion resistant coupler, a light-sensitive silver halide and at least one compound represented by the following general formula (I) in the same layer or different layers on a support. ##STR1## Wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a hydrogen atom or an alkyl group having from 1 to 10 carbon atoms, or R.sub.1 and R.sub.2 may be bonded to each other to form a heterocyclic ring together with the nitrogen atom; R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which may be the same or different, each represents a hydrogen atom, a halogen atom, a hydroxy group, an amino group, an alkoxy group, an acylamido group, a sulfonamido group, an alkylsulfonamido group or an alkyl group, or R.sub.1 and R.sub.6 or R.sub.2 and R.sub.3 may be bonded to each other to form a 5-membered or 6-membered ring; X represents HPF.sub.6 or HBF.sub.4 ; and n represents an integer from 1 to 3.Type: GrantFiled: May 18, 1983Date of Patent: September 25, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Takatoshi Ishikawa, Katsusuke Endo, Sigeru Kuwazima, Eiichi Kato, Nobutaka Ohki
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Patent number: 4468450Abstract: This invention relates to photographic processes and products for forming an image in dye from a colorless precursor of a preformed image dye which is substituted with a moiety containing a thiazolidinyl group, said thiazolidinyl group (a) being capable of undergoing cleavage imagewise in the presence of an imagewise distribution of silver ion and/or soluble silver complex and (b) possessing a substituent on the carbon atom in the 2-position which upon cleavage of said thiazolidinyl group, undergoes a .beta.-elimination reaction followed by an intramolecularly accelerated nucleophilic displacement reaction, which moiety maintains the precursor in its colorless form at least until said thiazolidinyl group undergoes said cleavage. In a further embodiment, this sequence of reactions is used to release an imagewise distribution of a photographically useful reagent which reagent may be, for example, a photographically active reagent.Type: GrantFiled: June 2, 1983Date of Patent: August 28, 1984Assignee: Polaroid CorporationInventors: Frank A. Meneghini, Paul S. Palumbo
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Patent number: 4468449Abstract: This invention relates to photographic processes and products for forming an image in dye from a colorless precursor of a preformed image dye which is substituted with a moiety containing a thiazolidinyl group, said thiazolidinyl group (a) being capable of undergoing cleavage imagewise in the presence of an imagewise distribution of silver ion and/or soluble silver complex and (b) possessing a substituent on the carbon atom in the 2-position that undergoes a .beta.-elimination reaction upon said imagewise cleavage, which moiety maintains the precursor in its colorless form at least until said thiazolidinyl group undergoes said cleavage. In a further embodiment, an imagewise distribution of a photographically useful reagent, which reagent may be, for example, a photographically active reagent, is released as a carbamic acid by a .beta.-elimination reaction following the cleavage of a thiazolidinyl group whereby said reagent is provided with a solubilizing group at least during the initial stages of processing.Type: GrantFiled: June 2, 1983Date of Patent: August 28, 1984Assignee: Polaroid CorporationInventors: Roberta R. Arbree, James W. Foley, Frank A. Meneghini
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Patent number: 4468451Abstract: This invention relates to photographic processes and products for forming an image in dye from a colorless precursor of a preformed image dye which is substituted with a moiety comprising a 1,3-sulfur-nitrogen group, said 1,3-sulfur-nitrogen group (a) being capable of undergoing cleavage in the presence of silver ion and/or soluble silver complex, and (b) possessing an amide substituent on the carbon atom in the 2-position that undergoes an intramolecularly accelerated cleavage reaction following the cleavage of said 1,3-sulfur-nitrogen group, which moiety maintains said precursor in its colorless form at least until the 1,3-sulfur-nitrogen group undergoes said cleavage. In a further embodiment, the cleavage of the amide substituent following the cleavage of the 1,3-sulfur-nitrogen group is used to provide an imagewise distribution of a photographically useful reagent, which reagent may be, for example, a photographically active reagent.Type: GrantFiled: June 2, 1983Date of Patent: August 28, 1984Assignee: Polaroid CorporationInventor: James W. Foley
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Patent number: 4447522Abstract: A method of forming a photographic image which comprises development processing with an alkaline activator solution a silver halide photographic light-sensitive material comprising a support having thereon at least one surface latent image type silver halide emulsion layer, and containing in at least one layer selected from the silver halide emulsion layer and another hydrophilic colloid layer(1) a developing agents;(2) an acylhydrazine compound represented by formula (I):R.sup.1 NHNHCOR.sup.2 (I)wherein R.sup.1 represents an unsubstituted or substituted aryl group or alkyl group; and R.sup.2 represents a hydrogen atom, or an unsubstituted or substituted aryl group or alkyl group; and(3) at least one compound represented by formula (II): ##STR1## wherein each of W.sup.1 and W.sup.2 can represent a hydrogen atom or an aliphatic group or W.sup.1 and W.sup.2 are bonded each other to form a ring; W.sup.3 represents a divalent aliphatic group; Q.sup.Type: GrantFiled: April 18, 1983Date of Patent: May 8, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeo Hirano, Yoshihiro Takagi
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Patent number: 4446216Abstract: Photographic material which comprises in at least one silver halide emulsion layer or a layer or layers adjacent thereto at least one substituted hydroquinone compound of the formula ##STR1## where R is hydrogen or optionally substituted alkyl, aryl or a heterocyclic group, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are each hydrogen, halogen or optionally substituted alkyl,x is 0 or 1,y is 0 or 1,and R.sub.1 is hydrogen or a group of the formula ##STR2## where R, x and y are as just defined.Type: GrantFiled: November 23, 1982Date of Patent: May 1, 1984Inventors: Norman A. Smith, Stephen R. Postle, William E. Long
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Patent number: 4439519Abstract: A silver halide photographic light-sensitive material containing a diffusion resistant coupler, a light-sensitive silver halide and at least one compound represented by the following general formula (I) in the same layer or different layers on a support. ##STR1## wherein R.sup.1 and R.sup.2 independently represent an alkyl group having from 1 to 5 carbon atoms, a hydroxyalkyl group having from 1 to 5 carbon atoms, an alkoxyalkyl group having from 2 to 10 carbon atoms or an alkylsulfonamidoalkyl group having from 2 to 10 carbon atoms; R.sup.3 represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms or an alkoxy group having from 1 to 5 carbon atoms; X represents a hydrogen atom or a group capable of being removed with alkali; Y represents ##STR2## and Z represents an alkyl group, an alkenyl group, an aryl group or a heterocyclic group.Type: GrantFiled: May 5, 1983Date of Patent: March 27, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobutaka Ohki, Ken Kawata, Isamu Itoh
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Patent number: 4438195Abstract: Silver halide developer compounds containing amino groups and attached in the form of a salt to ion exchangers are embedded in layers of photographic recording material comprising at least one silver halide emulsion layer. In color photographic recording materials, the silver halide emulsion layers may have color-providing compounds associated with them.Type: GrantFiled: November 3, 1982Date of Patent: March 20, 1984Assignee: Agfa-Gevaert AktiengesellschaftInventors: Friedrich-Wilhelm Kunitz, Karl-Wilhelm Schranz
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Patent number: 4429982Abstract: A stabilization processor is provided having activator, stop, stabilizer and rinse baths sequentially arranged therein. A plurality of pairs of upper and lower rollers are provided with at least one pair being disposed in each bath. The upper rollers in each pair of rollers is driven by a worm gear, while the lower roller is driven by frictional coaction with the upper rollers and the stabilization paper. The movement of the rollers urges the stabilization paper through the stabilization processor. The rotation of the lower roller transports the chemical solution in each bath into contact with the stabilization paper. The stop bath assures no contamination of the stabilizer bath by the activator solution. A pumping and recirculation system is provided for each bath. The recirculation system enables complete draining of the stabilization processor during periods of non-use.Type: GrantFiled: April 8, 1982Date of Patent: February 7, 1984Assignee: Pluribus Products, Inc.Inventors: Peter V. Martino, Peter Meyers
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Patent number: 4429036Abstract: A method of forming a photographic image which comprises development processing with an alkaline aqueous activator solution a silver halide photographic light-sensitive material comprising a support having thereon at least one surface latent image type silver halide emulsion layer, and containing in at least one layer selected from a silver halide emulsion layer and another hydrophilic colloid-layer (1) a hydroquinone series developing agent and (2) an acylhydrazine compound represented by formula (I):R.sup.1 NHNHCOR.sup.2 (I)wherein R.sup.1 represents an unsubstituted or substituted aryl group or alkyl group; and R.sup.2 represents a hydrogen atom, or an unsubstituted or substituted aryl group or alkyl group,wherein the aqueous activator solution or a prebath thereof contains at least one compound represented by formula (II): ##STR1## wherein each of W.sup.1, W.sup.2, W.sup.3, and W.sup.Type: GrantFiled: March 31, 1983Date of Patent: January 31, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeo Hirano, Yoshihiro Takagi
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Patent number: 4427757Abstract: A tannable photographic element and method therefore, the element comprising a uniquely treated opaque, translucent, or transparent base support and having at least one pigment in reactive association with the silver halide emulsion layer is useful in the graphic arts. The base support comprises an extremely thin gelatin subbing layer substantially free of hardener, or no subbing at all, on a primed base support.Type: GrantFiled: May 18, 1983Date of Patent: January 24, 1984Assignee: Minnesota Mining and Manufacturing CompanyInventors: George W. Beebe, Michael T. Macioch
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Patent number: 4420551Abstract: This application relates to the use of certain dihydro-benzotriazine compounds as photographic silver halide developing agents and to photographic processes, products and compositions which utilize the same. The compounds are effective developers in acid environment as well as in basic environment. Also described are novel dihydro-benzotriazine compounds.Type: GrantFiled: January 31, 1983Date of Patent: December 13, 1983Assignee: Polaroid CorporationInventor: Emmett S. McCaskill
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Patent number: 4409321Abstract: A method for reproducing a color image. A dye image is formed on a photographic light-sensitive material by imagewisely exposing the material and processing to form a dye image. Through the imaged photographic light-sensitive material, an exposure is made on a photographic printing light-sensitive material which is processed in an alkaline activator solution to form a dye image thereon. The photographic light-sensitive material contains a transparent support provided thereon with red-sensitive, green-sensitive, and blue-sensitive silver halide emulsion layers. The layers each contain one of three different nondiffusible couplers capable of forming, by coupling, compounds having spectral absorption maximum wavelength in the wavelength region longer than 340 nm. The spectral absorption maximum wavelength of the compounds differ by at least 30 nm.Type: GrantFiled: January 22, 1982Date of Patent: October 11, 1983Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Kaoru Onodera, Toshifumi Iijima, Wataru Fujimastu
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Patent number: 4390606Abstract: A color-forming para-sulfonamidodiphenylamine dye precursor in a photographic material and process enables formation of a sulfonimide dye image by means of cross-oxidation without the need for a coupling reaction. The color-forming para-sulfonamidodiphenylamine dye precursor is useful in a photographic silver halide material for producing (i) a dye image, or (ii) a dye image and silver image. The exposed photographic material is processed to produce (a) a positive dye image, (b) a negative dye and negative silver image, (c) a negative dye image or (d) a positive dye image and a positive silver image.Type: GrantFiled: July 1, 1982Date of Patent: June 28, 1983Assignee: Eastman Kodak CompanyInventors: Rolf S. Gabrielsen, Patricia A. Graham, James E. Klijanowicz, Max H. Stern
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Patent number: 4385108Abstract: A method of forming negative dot images which comprises imagewise exposing through a contact screen a silver halide photographilic light-sensitive material of substantially the surface latent image type containing in a silver halide emulsion layer or another hydrophilic colloidal layer(a) a hydroquinone developing agent, and(b) a compound represented by the formula, R.sup.1 NHNHCOR.sub.2, wherein R.sup.1 is an aryl group which may be substituted, and R.sup.2 is a hydrogen atom, an alkyl group which may be substituted, or an aryl group which may be substituted, and thereafter processing the thus exposed light-sensitive material with an activator aqueous solution having a pH of 11.5 or more.Type: GrantFiled: June 23, 1980Date of Patent: May 24, 1983Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshihiro Takagi, Yoshitaka Akimura, Hiroyuki Mifune, Eiichi Okutsu
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Patent number: 4374922Abstract: A method for the formation of a dye image. A silver halide color photographic light-sensitive material, having a support, component layers which are provided on the support and which have a swelling degree below 250 in the alkaline bath and components including an aromatic primary amine color developing agent or a precursor thereof, a nondiffusing yellow coupler, a nondiffusing magenta coupler and a nondiffusing phenolic cyan coupler having a substituted or unsubstituted acylamino group at the second and fifth positions thereof, is color developed in an alkaline bath. The material is then processed in a bleach-fixing bath.Type: GrantFiled: July 10, 1981Date of Patent: February 22, 1983Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Keiji Ohbayashi, Akihiko Miyamoto, Masaru Iwagaki, Makoto Kajiwara
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Patent number: 4371603Abstract: This invention relates to amino hydroxy cyclohexenones of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are alkyl, usually containing 1 to 20 carbon atoms.In another embodiment, the present invention is directed to the use of the above-denoted compounds as photographic silver halide developing agents and to photographic processes, products and compositions employing the same.Type: GrantFiled: December 30, 1980Date of Patent: February 1, 1983Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Eva R. Karger
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Patent number: 4371609Abstract: A method of forming dye images by processing a photographic material containing imagewise distributed catalyzer substance in the presence of hydrogen peroxide, a coupler and certain aromatic primary amine compounds.Type: GrantFiled: July 16, 1981Date of Patent: February 1, 1983Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Makoto Kajiwara, Akihiko Miyamoto, Keiji Ohbayashi, Masaru Iwagaki
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Patent number: 4369245Abstract: A photographic element for tanning development which comprises a support, a layer of silver halide emulsion in non-hardened gelatin including a tanning developer dispersed therein, and over said emulsion layer, a layer of non-hardened gelatin comprising at least one colored pigment dispersed therein, characterized by the silver in said silver halide emulsion layer being present in a quantity of less than 0.6 g/m.sup.2 with a silver/gelatin ratio of less than 0.4. A method for obtaining a colored relief image in such an element is shown.Type: GrantFiled: September 8, 1981Date of Patent: January 18, 1983Assignee: Minnesota Mining and Manufacturing CompanyInventors: Marco Beruto, Piero Ramello
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Patent number: 4362795Abstract: A process for forming photographic images comprising a silver image and a dye image, comprising development processing an imagewise exposed silver halide photographic light-sensitive material containing a 4-alkoxy-1-naphthol represented by the formula (I) ##STR1## wherein R represents an alkyl group, an alkoxyalkyl group, or a hydroxyalkyl group, and the number of carbon atoms in the substituent represented by R is from 1 to 4.The process of this invention is particularly useful in the field of X-ray photography, in order to provide an image of increased density for a given silver content. A novel silver halide photographic light-sensitive material includes the above 4-alkoxy-1-naphthol in a photographic colloid layer thereof, preferably the silver halide emulsion layer.Type: GrantFiled: August 29, 1980Date of Patent: December 7, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Junkichi Ogawa, Minoru Yamada, Tsutomu Hamaoka
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Patent number: 4350752Abstract: Imidomethyl blocked photographic reagents are useful in photographic elements, film units and processes. The blocked photographic reagents have the structure: ##STR1## wherein: J represents ##STR2## X represents the atoms to complete a 5- or 6-membered ring or ring system; R represents hydrogen, alkyl or 1 to 4 carbon atoms or aryl of 6 to 12 carbon atoms; andPR represents the residue of an organic photographic reagent containing a heteroatom through which it is joined to the imidomethyl blocking group.Type: GrantFiled: December 29, 1980Date of Patent: September 21, 1982Assignee: Eastman Kodak CompanyInventors: James A. Reczek, Thomas R. Welter
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Patent number: 4346154Abstract: A stain retarding concentration of a phosphine antistain agent or phosphine antistain agent precursor in the undercoat layer of a photographic silver halide element comprising a support having thereon (a) a photographic silver halide gelatino emulsion layer, and (b) an undercoat layer between the emulsion layer and the support, provides reduced stain in the element upon exposure and processing. The photographic element preferably comprises a silver halide developing agent. The photographic element, after exposure, is preferably processed by means of an aqueous alkaline activator bath and then an aqueous thiosulfate stabilizer bath.Type: GrantFiled: June 22, 1981Date of Patent: August 24, 1982Assignee: Eastman Kodak CompanyInventors: Donald F. McLaen, Arthur H. Herz
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Patent number: 4332878Abstract: A photographic image-forming method comprising imagewise exposing a silver halide photographic light-sensitive element containing a specific hydroquinone derivative in the silver halide emulsion layer of substantially the surface latent image type or at least one hydrophilic colloid layer thereof and then developing the exposed light-sensitive element in the presence of a specific hydrazine compound. The method forms a photographic image having markedly high negative gradation.Type: GrantFiled: April 30, 1981Date of Patent: June 1, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshitaka Akimura, Shigeo Hirano, Hiroyuki Mifune, Eiichi Okutsu
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Patent number: 4330617Abstract: The compounds represented by the general formula (I) or (II) as defined in the specification are novel and useful developing agent precursors in silver halide photographic light sensitive materials.Type: GrantFiled: February 4, 1981Date of Patent: May 18, 1982Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Minoru Ohashi, Katsuaki Iwaosa
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Patent number: 4297437Abstract: A method for processing an exposed color photographic material containing a color developing agent or precursor by developing with a color developer which is replenished.Type: GrantFiled: November 24, 1980Date of Patent: October 27, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Yutaka Kaneko, Shigeto Hirabayashi, Satoshi Kawakatsu, Hidetaka Ninomiya
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Patent number: 4294915Abstract: There are described novel compounds which include a silver halide developing function, a colorless ligand which is a radical of an iminodiacetic acid and a radical containing an onium group. The compounds are useful in photography as silver halide developing agents and also may be complexed with metals to form dye developers.Type: GrantFiled: July 11, 1980Date of Patent: October 13, 1981Assignee: Polaroid CorporationInventor: Elbert M. Idelson
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Patent number: 4192682Abstract: Process of forming a high-contrast silver image which process comprises treating a light-sensitive silver halide photographic material comprising a support, a silver halide emulsion layer coated thereon and another hydrophilic colloidal layer, at least one of which contains a substantially non-diffusible compound having oxidation power on a hydroquinone developing agent, with a developer containing no hydroquinone developing agent after exposed imagewise.Type: GrantFiled: January 16, 1978Date of Patent: March 11, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Yoshio Nishina, Syunji Matsuo, Toshio Nagatani, Kazuo Takahashi, Takeshi Habu