And Inorganic Silver Compound Patents (Class 430/619)
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Patent number: 5041353Abstract: A process for preparation of a light-sensitive material is disclosed. The light-sensitive material comprises a support and a light-sensitive layer which contains light-sensitive silver halide, a reducing agent, a base precursor and an ethylenic unsasturated polymerizable compound. The process comprises emulsifying an aqueous dispersion of a base precursor in an oily medium containing the polymerizable compound in the range of 0.1 to 100 weight %.Type: GrantFiled: December 31, 1990Date of Patent: August 20, 1991Assignee: Fuji Photo Film Co., Ltd.Inventor: Keiji Takeda
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Patent number: 5039589Abstract: A light-sensitive material comprising a support and a light-sensitive layer provided thereon is disclosed. The light-sensitive layer contains silver halide, a reducing agent, an ethylenically unsaturated polymerizable compound and a base precursor composed of a salt of a carboxylic acid with an organic base. The silver halide, reducing agent, polymerizable compound and base precursor are contained in microcapsules which are dispersed in the light-sensitive layer. The microcapsules are obtained by (1) dispersing the base precursor in water, (2) emulsifying the resulting dispersion in the polymerizable compound, (3) further emulsifying the resulting emulsion in an aqueous medium containing a nonionic water-soluble polymer and (4) forming the shell of the microcapsules. It is preferred that the base precursor is dispersed in water in the presence of a nonionic water-soluble polymer or an emphoteric water-soluble polymer, and the resulting dispersion is emulsified in the polymerizable compound.Type: GrantFiled: June 20, 1990Date of Patent: August 13, 1991Assignee: Fuji Photo Film Co., Ltd.Inventor: Ryuichi Takahashi
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Patent number: 5037719Abstract: An image-forming method for a light-sensitive material comprising a support and a light-sensitive layer containing silver halide, an ethylenically unsaturated polymerizable compound, a base or base precursor and a salt of a reducing agent, wherein a heat development process is performed simultaneously with or after an imagewise exposure in the presence of the base or base precursor activator to release the reducing agent from the salt and to imagewise polymerize the polymerizable compound.Type: GrantFiled: August 9, 1990Date of Patent: August 6, 1991Assignee: Fuji Photo Film Co., Ltd.Inventor: Koichi Nakamura
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Patent number: 5028518Abstract: Photothermographic emulsions sensitive to ultraviolet radiation can be coated on both sides of polymeric film which is inherently absorptive of the ultraviolet radiation, preventing crossover effects in cassette loading of the film.Type: GrantFiled: September 24, 1990Date of Patent: July 2, 1991Assignee: Minnesota Mining and Manufacturing CompanyInventors: Thomas D. Lyons, Sergio Pesce, John M. Winslow
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Patent number: 5026633Abstract: Photothermographic dry silver emulsions containing a benzylidene lenco dye and a development accelerator provide a high density yellow image upon exposure to actinic radiation and thermal developing at a relatively low temperature and for a short period of time.Type: GrantFiled: July 27, 1989Date of Patent: June 25, 1991Assignee: Minnesota Mining and Manufacturing CompanyInventor: David C. Weigel
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Patent number: 5001032Abstract: A photosensitive material comprises a photosensitive layer and a polymerizable layer which are laminated. An area of the polymerizable layer, corresponding to an unexposed area of the photosensitive layer, is polymerized when the photosensitive material is exposed to light with a wavelength of 400 to 900 nm and heated to 60.degree. to 80.degree. C.Type: GrantFiled: December 19, 1989Date of Patent: March 19, 1991Assignee: Canon Kabushiki KaishaInventors: Masato Katayama, Tetsuro Fukui, Kozo Arahara, Yoshio Takasu, Kenji Kagami
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Patent number: 4983494Abstract: An image is formed in a photographic element by a process comprising a step of heating a heat-developable photosensitive material in the presence of a specific compound which typically releases a phenylmercaptotetrazole having a substituted benzene ring and serving as a development retarder.Type: GrantFiled: October 18, 1989Date of Patent: January 8, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroshi Kitaguchi, Masatoshi Kato
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Patent number: 4968598Abstract: A heat developable color light-sensitive material comprising a support having thereon at least light-sensitive silver halide, a reducing agent and/or a reducing agent precursor, a binder, a dye providing substance which releases a mobile dye in counter-correspondence to a latent image formed by imagewise exposure, and an oxidizable compound which has a single bond cleaved by reduction and which does not release any substance having a photographic effect.Type: GrantFiled: March 24, 1989Date of Patent: November 6, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Koki Nakamura, Hiroyuki Hirai
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Patent number: 4956260Abstract: A light-sensitive material comprising a light-sensitive layer provided on a support wherein the light-sensitive layer contains silver halide, a reducing agent, a polymerizable compound, and an additive compound selected from the group consisting of a 5- or 6-membered nitrogen containing heterocyclic compound, thiourea, a thiourea derivative, a thioether compound, polyethylene glycol and a polyethylene glycol derivative. Thermal image-forming methods utilizing the light-sensitive materials are also disclosed.Type: GrantFiled: December 29, 1986Date of Patent: September 11, 1990Assignee: Fuji Photo Film Co., Ltd.Inventor: Koichi Nakamura
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Patent number: 4952479Abstract: A process which comprises transferring a dye imagewise formed on a silver halide light-sensitive material comprising a support having thereon a light-sensitive silver halide, a binder and a mobile dye-forming compound which forms a dye in a chemical relation of the compound upon a reduction reaction of the silver halide to silver by a heat development of the light-sensitive material after or simultaneously with an image exposure, into a dye fixing layer in the presence of a thermal solvent at a high-temperature at which the thermal solvent is in a molten state. The process can be conducted without supplying solvent from the outside.Type: GrantFiled: June 20, 1986Date of Patent: August 28, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiaki Aono, Koichi Nakamura
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Patent number: 4952474Abstract: A light-sensitive material comprises a support and a light-sensitive layer containing silver halide, a polymerizable compound and a hydrazine derivative. The light-sensitive layer further contains a reducing agent having the following formula (I): ##STR1## in which each of Ar.sup.1 and Ar.sup.2 independently is an aryl group; and each of R.sup.1, R.sup.2 and R.sup.3 independently is a monovalent group such as hydrogen, a halogen atom, an alkyl group, a cycloalkyl, group, an aralkyl group, an aryl group, an alkenyl group, an alkynyl group, a heterocyclic group, an alkoxy group, an alkylthio group and an acylamino group.Type: GrantFiled: April 13, 1988Date of Patent: August 28, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Jiro Tsukahara, Nobutaka Ohki, Makoto Yamada
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Patent number: 4952486Abstract: An image-bearing paper is provided which contains a bonding agent that is reticulated by ionizing rays, or bears a coating on at least one surface that contains a bonding agent reticulated by ionizing rays, whereby the bonding agent is predominantly formed of unsaturated substances, and reticulation takes place by means of ionizing rays in or on the paper, which is used as a support material for thermally developable photographic layers, or as an image-receiving material for thermally developed images produced by diffusion of the image-forming substance.Type: GrantFiled: October 10, 1989Date of Patent: August 28, 1990Assignee: Felix Schoeller, Jr. GmbH & Co., KGInventors: Wieland Sack, Reiner Anthonsen
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Patent number: 4942115Abstract: A thermally processable imaging element having a hydrophobic imaging layer, an adhesion promoting polymer layer and an overcoat layer comprising poly(silicic acid) provides improved adhesion of the overcoat layer during thermal processing. The adhesion promoting layer comprises a terpolymer that promotes adhesion between the hydrophobic imaging layer and the overcoat layer without adversely affecting sensitometric properties of the imaging element. The adhesion promoting layer is useful in photothermographic and thermographic elements and processes.Type: GrantFiled: April 24, 1989Date of Patent: July 17, 1990Assignee: Eastman Kodak CompanyInventor: Wojciech M. Przezdziecki
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Patent number: 4939064Abstract: A light-sensitive material comprises a support and a light-sensitive layer containing silver halide, a reducing agent, an ethylenic unsaturated polymerizable compound and a base precursor in the form of a salt of an organic base with a carboxylic acid. The silver halide, reducing agent, polymerizable compound and base precursor are contained in microcapsules which are dispersed in the light-sensitive layer. The organic base of the base precursor is a diacidic to tetraacidic base which is composed of two to four amidine moieties and at least one linking group for the amidine moieties. The linking group is a residue of a hydrocarbon or a heterocyclic ring. The amidine moiety corresponds to an atomic group formed by removing one or two hydrogen atoms from an amidine having the following formula (I): ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.Type: GrantFiled: July 28, 1988Date of Patent: July 3, 1990Assignee: Fuji Photo Film Co., Ltd.Inventor: Taku Nakamura
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Patent number: 4923792Abstract: A photothermographic element comprising:(A) a coating comprising a support bearing a photothermographic medium, the medium comprising a light sensitive silver halide in reactive association with a silver salt of an organic acid and a color generating reducing agent which is a leuco compound which is oxidizable by silver ions into a colored dye of the general formula: ##STR1## in which: n=0, 1 or 2,R.sup.1 represents H, CN, lower alkyl of 1 to 5 carbon atoms, aryl or COOR.sup.6 in which R.sup.6 is lower alkyl of 1 to 5 carbon atoms or aryl,R.sup.2 and R.sup.3 independently represent CN, NO.sub.2, COOR.sup.6, SO.sub.2 R.sup.6, CONHR.sup.6 in which R.sup.6 is as defined above or R.sup.2 and R.sup.3 together represent the necessary atoms to form a 5- or 6-membered carbocyclic or heterocyclic ring having ring atoms selected from C, N, O and S atoms, whch carbocyclic or heterocyclic rings possess at least one conjugated electron withdrawing substituent,R.sup.4 and R.sup.Type: GrantFiled: June 20, 1989Date of Patent: May 8, 1990Assignee: Minnesota Mining and Manufacturing CompanyInventors: Duncan M. A. Grieve, Stephen S. C. Poon, Tran V. Thien, Kumars Sakizadeh, David C. Weigel
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Patent number: 4910115Abstract: A light-sensitive photohardenable composition comprising a reducing agent, a light-sensitive silver halide, a polymerizable compound, and a coumarin or a ketocoumarin.Type: GrantFiled: November 21, 1988Date of Patent: March 20, 1990Assignee: The Mead CorporationInventors: William H. Simpson, Katherine A. Gyure
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Patent number: 4902599Abstract: A light-sensitive material is described, comprising a support having provided thereon a light-sensitive layer containing at least a light-sensitive silver halide, a developing agent, a polymerizable compound, a color image forming substance, and a hydrazine derivative represented by at least one of the following formula (I) and a hydrazine derivative represented by the following formula (II), in which said color image forming substance is immobilized by imagewise exposure to light, followed by heat development under conditions substantially not containing water: ##STR1## wherein R.sub.1 represents a substituted or unsubstituted alkyl, aralkyl, aryl, alkenyl, alkynyl, or heterocyclic group; and R.sub.2 represents a hydrogen atom or a substituted or unsubstituted alkyl, cycloalkyl, aralkyl, aryl, alkenyl, alkynyl, heterocyclic, alkoxy, aryloxy, alkylthio, arylthio, or amino group; ##STR2## wherein R.sub.Type: GrantFiled: October 10, 1986Date of Patent: February 20, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Soichiro Yamamoto, Toshiaki Aono, Koichi Nakamura, Kozo Sato
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Patent number: 4883747Abstract: A photothermographic element comprising a support bearing a photothermographic medium, the medium comprising a light sensitive silver halide in reactive association with a silver salt of an organic acid and a color generating reducing agent which is a leuco compound which is oxidisable by silver ions into a colored dye of the general formula: ##STR1## in which: n=0, 1 or 2,R.sup.1 represents H, CN, lower alkyl of 1 to 5 carbon atoms, aryl or COOR.sup.6 in which R.sup.6 is lower alkyl of 1 to 5 carbon atoms or aryl,R.sup.2 and R.sup.3 independently represent CN, NO.sub.2, COOR.sup.6, SO.sub.2 R.sup.6, CONHR.sup.6 in which R.sup.6 is as defined above or R.sup.2 and R.sup.3 together represent the necessary atoms to form a 5- or 6-membered carbocyclic or heterocyclic ring having ring atoms selected from C, N, O and S atoms, which carbocyclic or heterocyclic rings possess at least one conjugated electron withdrawing substituent,R.sup.4 and R.sup.Type: GrantFiled: May 31, 1988Date of Patent: November 28, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventors: Duncan M. A. Grieve, Stephen S. C. Poon, Tran V. Thien, Kumars Sakizadeh, David C. Weigel
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Patent number: 4880723Abstract: A photographic silver halide photosensitive material is provided comprising a substantially water-insoluble basic metal compound and a water-soluble salt of the same metal ion as the basic metal compound which inhibits dissolution of the basic metal compound. An image is formed by combining the photosensitive material with a complexing compound in the presence of water and causing complexing reaction of the basic metal compound and the complexing compound to occur, increasing the pH of the system.Type: GrantFiled: February 13, 1987Date of Patent: November 14, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Hirai, Yoshiharu Yabuki
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Patent number: 4880725Abstract: A color image is formed by imagewise exposing a color photosensitive material comprising at least a silver halide and a coupler and subjecting the material to intensified development with a processing solution containing a reducing agent and an intensifier. A substantially water-insoluble basic metal compound is previously contained in the silver halide based color photosensitive material, while the processing solution contains a compound capable of complexing reaction with the metal ion of the substantially water-insoluble basic metal compound to release a base.Type: GrantFiled: December 27, 1988Date of Patent: November 14, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Hirai, Haruhiko Iwano
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Patent number: 4877722Abstract: A heat developable color photographic recording material is improved in its D.sub.min /D.sub.max ratio and sensitivity if it contains a silver halide emulsion in which the grains have at least three zones differing in their silver halide composition.Type: GrantFiled: December 30, 1988Date of Patent: October 31, 1989Assignee: AGFA-Gevaert AktiengesellschaftInventors: Manfred Peters, Manfred Becker, Kaspar Wingender, Thomas Kaluschke, Sieghart Klotzer
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Patent number: 4868089Abstract: A positive image forming method is disclosed. Said method comprises in sequence the steps of subjecting to imagewise exposure a silver halide photographic material having a silver halide emulsion layer containing a non-prefogged internal image forming silver halide, increasing the surface sensitivity of said silver halide in the substantial absence of water and performing development.Type: GrantFiled: April 13, 1988Date of Patent: September 19, 1989Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Tatsuhiko Kobayashi, Sohei Goto, Ken Okauchi
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Patent number: 4865940Abstract: A color photographic recording material contains a dispersion of hardened particles of a complex coacervate (packet emulsion) in at least one layer of binder, which particles are hardened with a hardener corresponding to the following formula I ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and each denotes an alkyl group with 1 to 8 carbon atoms or an aryl or aralkyl group optionally substituted with an alkyl group having 1 or 2 carbon atoms or with a halogen atom or R.sup.1 and R.sup.2 together denote the atoms required for completing a heterocyclic ring, e.g. a piperidine or morpholine ring, optionally substituted with an alkyl group having 1 or 2 carbon atoms or with a halogen atom,R.sup.3 denotes a hydrogen atom or an alkyl group having 1 or 2 carbon atoms andn represents 0 or 2.Type: GrantFiled: February 9, 1989Date of Patent: September 12, 1989Assignee: Agfa-Gevaert AktiengesellschaftInventors: Karl-Wilhelm Schranz, Gunther Schenk
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Patent number: 4857439Abstract: A method of making a photothermographic silver halide element comprises the combination of (I) adding an alkyl carboxylic acid containing 8 to 22 carbon atoms to a layer of the element comprising photosensitive silver halide and (II) after preparation of the layer comprising silver halide and before exposure of the element to light heating the element uniformly at a temperature and for a time sufficient to enable the photothermographic element to exhibit increased latent image stability upon imagewise exposure to light. The photothermographic element includes photosensitive silver halide and an oxidation-reduction image forming combination in a polmeric binder. A developed visible image is provided in such a photothermographic element after exposure to light by uniformly heating the exposed photothermographic element to moderately elevated temperatures.Type: GrantFiled: April 4, 1988Date of Patent: August 15, 1989Assignee: Eastman Kodak CompanyInventors: Edward L. Dedio, John W. Reeves
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Patent number: 4847179Abstract: Water-soluble substantially non-hardening aldehydes or water-soluble substantially non-hardening aldehyde precursor compounds are suitable as fog-reducing compounds for the photographic dye diffusion transfer process in which an imagewise-exposed color photographic recording material containing light-sensitive silver salt and a non-diffusing dye-releasing compound in at least one binder layer arranged on a layer support, is developed, preferably under the effect of heat, to produce a diffusible dye image and in which the diffusible dye image is transferred to an image receptor layer.Type: GrantFiled: October 19, 1987Date of Patent: July 11, 1989Assignee: AGFA-Gevaert AktiengessellschaftInventors: Immo Boie, Manfred Peters, Wolfgang Himmelmann, Thomas Kaluschke, Gunther Schenk, Kaspar Wingender, Karl Frank
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Patent number: 4845018Abstract: An image-forming process involving a heating step is disclosed, which comprises conducting the heating in the presence of a compound represented by the following general formula (I): ##STR1## wherein: R.sup.1 and R.sup.2, which may be the same or different, each represents a group selected from an aryl group, a substituted aryl group, a heterocyclic group, and a substituted heterocyclic group;R.sup.3 represents a hydrogen atom, an alkyl group, a substituted alkyl group, a cycloalkyl group, a substituted cycloalkyl group, an aralkyl group, a substituted aralkyl group, or a group selected from those which are referred to with respect to R.sup.1 and R.sup.2 ;R.sup.1, R.sup.2, and R.sup.3 may form a ring structure via a hydrocarbon chain, a hetero atom-containing hydrocarbon chain or a hetero atom, or may be directly bound to each other to form a ring structure; andPUG represents a photographically useful group.Type: GrantFiled: February 18, 1986Date of Patent: July 4, 1989Assignee: Fuji Photo Film, Co., Ltd.Inventors: Kozo Sato, Hiroshi Kitaguchi, Masashi Takeuchi, Masaaki Tsukase, Masatoshi Kato
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Patent number: 4840882Abstract: In a heat-developable color light-sensitive material comprising a support having thereon at least two light-sensitive layers each comprising a light-sensitive silver halide, organic silver salt, dye-donating material capable of releasing or forming a diffusible dye by heat development, reducing agent, and hydrophilic binder, said at least two light-sensitive layers differing from each other in the color sensitivity of said light-sensitive silver halide and in the hue of said diffusible dye, said heat-developable color light-sensitive material, wherein at least one of said light-sensitive layer(s) containing said dye-donating materials are hardened with a hardening agent for said hydrophilic binder. The foregoing heat-developable color light-sensitive material prevents diffusion of the dye-donating material and reduces or prevents the color-crossover phenomenon. Transferability of the dye is also improved as is scratch resistance of the photographic component layers.Type: GrantFiled: August 31, 1988Date of Patent: June 20, 1989Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Masaru Iwagaki, Takashi Sasaki, Tawara Kumamura, Fumio Ishii, Kunihiro Koshizuka
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Patent number: 4839272Abstract: A heat-developable photosensitive material comprising (1) a silver halide emulsion, (2) a reducing agent, and (3) a binder on a support can be quickly heat developed to produce images having a high density and less fog by using the silver halide emulsion comprising an emulsion of silver halide grains having a distinct double-layered structure, that is, core/shell structure in the grain interior and an average grain size of at least 0.3 .mu.m in combination with (4) a specific compound of formula (I) or (II).Type: GrantFiled: March 27, 1987Date of Patent: June 13, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideki Ohmatsu, Hiroyuki Hirai
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Patent number: 4835096Abstract: Photothermographic elements of the dry silver type may be sensitized to the infrared with sensitizing dyes of the formula: ##STR1## in which: R.sup.1 represents a lower alkyl group of from 1 to 5 carbon atoms andX.sup.- represents an anion.Type: GrantFiled: April 2, 1987Date of Patent: May 30, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventor: Bernard A. Lea
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Patent number: 4824759Abstract: A method for forming an image, which comprises heating a light-sensitive material in the presence of a compound capable of forming a 2-mercaptobenzazole ring by a ring closing reaction when heated.In accordance with the method of the present invention, development is stopped at an appropriate time of development whereby an image having a high maximum density and low fog is obtained.A heat-developable light-sensitive material containing the compound is also disclosed.Type: GrantFiled: February 7, 1986Date of Patent: April 25, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Kozo Sato, Hiroshi Kitaguchi, Masashi Takeuchi, Masaaki Tsukase, Masatoshi Kato
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Patent number: 4820617Abstract: A heat-developable photosensitive material of which thermal fogging is markedly suppressed without detriment to image characteristics such as sensitivity, which is prepared by forming a single layer or multiple layers of a heat-developable photosensitive element comprising at least (a) an oxidation-reduction image-forming component comprising a long-chain fatty acid silver salt and a reducing agent, (b) a photosensitive silver halide or/and a photosensitive slilver halide-forming component, (c) a binder, and (d) at least one member selected from the compounds represented by the following general formula:HOOC--R--COOHwherein R represents an alkylene or alkenylene group of at least 4 carbon atoms which may be linear or branched, on a support.Type: GrantFiled: December 30, 1987Date of Patent: April 11, 1989Assignee: Oriental Photo Industrial Co., Ltd.Inventors: Tetuya Higuchi, Akira Tsukada, Yukio Takegawa
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Patent number: 4816372Abstract: Compounds of the formula I are suitable as thermal development and diffusion promoting agents for the heat development process. With the aid of said compounds higher color transfer densities can be achieved and/or the development time can be shortened. ##STR1## wherein X.sub.1 denotes --SO.sub.2 -- or--CO--;R.sup.1 to R.sup.4 denote alkyl, cycloalkyl, aralkyl or aryl;R.sup.5 and R.sup.6 denote acyl or a group as defined for R.sup.1 to R.sup.4 ; and R.sup.1 together with R.sup.5, R.sup.2 together with R.sup.6, R.sup.3 together with R.sup.4 and/or R.sup.1 together with R.sup.2 may in each case form a heterocyclic ring containing at least one nitrogen atom.Type: GrantFiled: September 14, 1987Date of Patent: March 28, 1989Assignee: AGFA-Gevaert AktiengesellschaftInventors: Gunther Schenk, Manfred Peters
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Patent number: 4816363Abstract: In a photographic element amenable to heat development or mobile dye heat transfer, an electroconductive layer is formed from a composition containing an electroconductive substance, typically carbon black, a hydrophilic binder, typically gelatin, and a water-insoluble compound having a melting point of up to 120.degree. C. and a boiling point of at least 175.degree. C., for example, trinonyl phosphate, such that the conductive layer undergoes a minimized change in electric resistance when folded.Type: GrantFiled: March 7, 1986Date of Patent: March 28, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideki Naito, Hiroyuki Ozaki
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Patent number: 4814254Abstract: In a photographic element amenable to heat development or mobile dye heat transfer, an electroconductive layer is formed from a composition containing an electroconductive substance, typically carbon black and a high molecular weight compound having a glass transition temperature of not higher than 40.degree. C. at a relative humidity of 20% or a melting point of not higher than 180.degree. C., for example, polyethylene glycol, such that the conductive layer undergoes a minimized change in electric resistance when folded.Type: GrantFiled: March 7, 1986Date of Patent: March 21, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideki Naito, Hiroyuki Ozaki
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Patent number: 4795697Abstract: Alkyl ketazine dyes are stabilized by the presence of poly(vinyl chloride) and/or poly(vinylidene chloride) binders in photothermographic emulsions.Type: GrantFiled: December 29, 1986Date of Patent: January 3, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventors: Kim M. Vogel, David C. Weigel, Roger A. Mader
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Patent number: 4792514Abstract: A light-sensitive material is described, comprising a support having provided thereon a light-sensitive layer containing at least a light-sensitive silver halide, a polymerizable compound, a color image forming substance, and a hydrazine derivative represented by formula (I): ##STR1## wherein R.sub.1 represents a monovalent group derived from a substituted or unsubstituted aromatic ring or aromatic heterocyclic ring; R.sub.2 and R.sub.3 each represents a substituted or unsubstituted aryl group; and R.sub.4 represents a hydrogen atom or a substituted or unsubstituted alkyl, aryl, alkoxycarbonyl, or carbamoyl group,in which the color image forming substance is immobilized by imagewise exposure to light followed by heat development under conditions substantially not containing water. The material exhibits high sensitivity and provides a color image through a simple, easy, and rapid dry processing step, with a reduced exposure time.Type: GrantFiled: October 10, 1986Date of Patent: December 20, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Taku Nakamura, Kozo Sato
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Patent number: 4788134Abstract: The present invention provides a heat-developable photographic light-sensitive material comprising, on a support, at least containing a light-sensitive silver halide, a binder, a reducing agent, and an organic silver salt, wherein said organic silver salt is a silver salt of a pyrazolazole-type compound represented by formula (I) ##STR1## wherein R.sup.1 and R.sup.2 each represents a hydrogen atom or a substituent; Za, Zb, and Zc each represents a methine group, a substituted methine group, .dbd.N-- or --NH--; and one of the Za-Zb bond and Zb-Zc bond is a double bond and the other is a single bond.The present heat-developable photographic light-sensitive materials are capable of forming images of high density, with low fog, in a short period of time.Type: GrantFiled: October 23, 1986Date of Patent: November 29, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Ozaki, Ken Kawada
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Patent number: 4788125Abstract: An imaging material comprising a support and a layer of photosensitive microparticles on one surface of said support, said microparticles including an image-forming agent and a photosensitive composition containing a polymer which is capable of undergoing cationically-initiated depolymerization and a photoinitiator including a silver halide and an organo silver salt, wherein, after exposing said microparticle to radiation, said microparticles, directly or with additional processing, release said image-forming agent or become permeable to a developer which reacts with said image-forming agent to form a visible image.Type: GrantFiled: May 4, 1987Date of Patent: November 29, 1988Assignee: The Mead CorporationInventors: Paul D. Davis, Joseph G. O'Connor
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Patent number: 4784939Abstract: Radiation sensitive thermally developable imaging elements comprise:(a) photosensitive silver halide,(b) light insensitive silver salt oxidizing agent,(c) reducing agent for silver ions, and(d) a benzoyl acid class of antifoggant.The antifoggants are effective in both reducing spurious background image densities and in stabilizing the film against sensitometric changes during storage.Type: GrantFiled: September 2, 1987Date of Patent: November 15, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventor: Oanh Van Pham
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Patent number: 4782010Abstract: The use of phenazine, phenoxazine and phenothiazine color forming developers in photothermographic dry silver emulsions provides a stable imaging system under both light and dark storage.Type: GrantFiled: December 29, 1986Date of Patent: November 1, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventors: Roger A. Mader, David C. Weigel, Louis M. Leichter, Kristen A. Hoff
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Patent number: 4782004Abstract: A heat-developable photosensitive material comprising at lesat (1) a photosensitive silver halide, (2) a binder, (3) a dye-providing substance, and (4) a specific reducing agent other than commonly used reducing agents for silver halide on a support can be heat developed to produce images having a high density and less fog and has improved shelf stability.Type: GrantFiled: November 17, 1986Date of Patent: November 1, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Masashi Takeuchi, Kozo Sato, Hiroyuki Hirai
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Patent number: 4775613Abstract: A heat-developable light-sensitive material comprising a support having thereon at least one layer containing a light-sensitive silver halide, a reducing agent, a binder and an acetylene silver compound.The heat-developable light-sensitive material which contains the novel organic silver compound can provide images having high density and low fog when subjected to a short period of developing time even when a small amount of a base processor is used.Type: GrantFiled: March 31, 1986Date of Patent: October 4, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Hirai, Hiroshi Hara, Ken Kawata
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Patent number: 4772544Abstract: A heat-developable photographic material is disclosed wherein the photographic material comprising at least one of an acid or a salt thereof having an acid dissociation constant pKa of 7 or less.Type: GrantFiled: August 7, 1985Date of Patent: September 20, 1988Assignee: Fuji Photo Film Co., Ltd.Inventor: Hiroyuki Hirai
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Patent number: 4770981Abstract: There is provided a multi-layer heat-developement-type color light-sensitive material comprising a support having thereon a layer containing light-sensitive silver halide grains, an organic silver salt, a reducing agent, a yellow dye donator substance and a binder, e.g. gelatin, a layer containing light-sensitive silver halide grains, an organic silver salt, a reducing agent, a magenta dye donator substance and a binder, and a layer containing light-sensitive silver halide grains, an organic silver salt, a reducing agent, a cyan dye donator substance and a binder, the binder of the respective layers amounting in total to from 3 g to 10 g per m.sup.2 of said support; preferably at least one layer of the light-sensitive material contains a heat solvent.Type: GrantFiled: June 17, 1987Date of Patent: September 13, 1988Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Tawara Komamura, Masaru Iwagaki, Toyoaki Masukawa
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Patent number: 4770989Abstract: A heat-developable color photosensitive element having a support bearing thereon at least one photographic component layer containing a photosensitive silver halide, an organic silver salt, a reducing agent, a dye donor substance and a binder. The photosensitive element is characterized by the photographic component layer which contains a thermal solvent and a binder which contains both a gelatin and a vinyl pyrrolidone polymer.Type: GrantFiled: May 4, 1987Date of Patent: September 13, 1988Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Tawara Komamura, Masaru Iwagaki, Takashi Sasaki, Fumio Ishii, Kunihiro Koshizuka
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Patent number: 4761360Abstract: A light-sensitive material comprising a light-sensitive layer which contains silver halide, a reducing agent and a polymerizable compound provided on a support, characterized in that the light-sensitive layer further contains a silver diazotate having the following formula:Ar--N.dbd.N--O--Ag(L).sub.nin which Ar is an aryl group or a heterocyclic group, each of which may have one or more substituent groups; L is a ligand; and n is 0, 1 or 2. Image-forming methods utilizing the light-sensitive materials are also disclosed.Type: GrantFiled: February 24, 1987Date of Patent: August 2, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Kozo Sato, Soichiro Yamamoto
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Patent number: 4761361Abstract: A method for forming an image comprising heating a light-sensitive material comprising a support having thereon at least a light-sensitive silver halide, a dye providing substance, a binder, and an acetylene silver compound, simultaneously with or after imagewise exposure thereof in the presence of water and at least one of a base and a base precursor, thereby transferring a diffusible dye thus formed or released to a dye fixing layer.Type: GrantFiled: August 11, 1986Date of Patent: August 2, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Ozaki, Hiroyuki Hirai, Ken Kawata
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Patent number: 4758503Abstract: A heat developable light-sensitive material containing a compound represented by the following general formula (I): ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a hydrogen atom, an alkyl group, a substituted alkyl group, a cycloalkyl group, an aralkyl group, a substituted aralkyl group, an aryl group, a substituted aryl group or a heterocyclic group, or R.sub.1 and R.sub.2 are bonded to each other to form a 5-membered or 6-membered carbocyclic ring or a heterocyclic ring which may be a saturated ring, an unsaturated ring or an aromatic ring, may be condensed and may further have one or more substituents; M represents an alkali metal ion, an alkaline earth metal ion, a transition metal ion, a protonated organic base or a quaternary ammonium ion; and n represents a reciprocal of the positive charge number of M.Type: GrantFiled: March 26, 1986Date of Patent: July 19, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Kozo Sato, Hiroyuki Hirai
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Patent number: 4756999Abstract: A photothermographic element comprising a substrate having coated thereon a photothermographic medium comprising a binder having dispersed therein an organic silver salt or complex, a photocatalyst and a reducing agent, characterized in that the photothermographic medium contains as an antifoggant, in the absence of mercury compounds, an effective antifogging amount of a compound of the general formula: ##STR1## characterized in that: X.sup.1 and X.sup.2 independently represent halogen atoms,X.sup.3 represents a halogen atom or an electron withdrawing substituent, andZ represents the necessary atoms to complete a ring system which may comprise a single ring or a fused ring system which rings may bear substituents.Type: GrantFiled: November 3, 1986Date of Patent: July 12, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventors: Steven Swain, Ronald E. Watts
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Patent number: H691Abstract: A heat-developable photographic element containing a light-sensitive silver halide and a binder on a support, and in addition, a base precursor and a photographic reagent capable of releasing a compound represented by the general formula (I) by reaction with a base in a light-sensitive layer and/or an image receiving layer. ##STR1## wherein Y is an atomic group necessary for forming a 5-, 6- or 9-membered heterocyclic ring.The photographic material has excellent temperature compensation capability and low fog.Type: GrantFiled: February 1, 1988Date of Patent: October 3, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroshi Kitaguchi, Masatoshi Kato