And Inorganic Silver Compound Patents (Class 430/619)
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Patent number: 4626500Abstract: A heat-developable photographic light-sensitive material is described, comprising a support having thereon, at least one layer containing a compound represented by the general formula (I) or (II) below: ##STR1## wherein R and R' each represents a group selected from a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, an amino group, an acylamino group, an alkoxy group, an alkylthio group, a sulfonylamino group, a heterocyclic ring group and a substituted group of them; X represents atoms forming a 5-membered or 6-membered ring; A represents a group causing a decarboxylation reaction.This heat-developable photographic light-sensitive material provides a high maximum density and low fog by heat-developing at a relatively low temperature and for a short time.Type: GrantFiled: September 13, 1985Date of Patent: December 2, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Kozo Sato, Hiroshi Kitaguchi, Hiroyuki Hirai
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Patent number: 4626499Abstract: A heat developable light-sensitive material is described, comprising a support having thereon a light-sensitive silver halide emulsion, a base or a base precursor, and a compound containing a group bonded to a carbon atom is represented by formula (I) ##STR1## wherein R.sup.2 represents an aryl group, a substituted aryl group, a heterocyclic group or a group represented by formula (A), (B), or (C) ##STR2## wherein R.sup.11 through R.sup.16 each represents an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group.Type: GrantFiled: April 26, 1985Date of Patent: December 2, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Masatoshi Kato, Hiroshi Kitaguchi
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Patent number: 4622289Abstract: A heat-developable light-sensitive material is described, comprising a support and at least one layer containing an alkali metal and/or alkaline earth metal salt of a carboxylic acid as a base precursor.Type: GrantFiled: April 19, 1984Date of Patent: November 11, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Hirai, Kozo Sato
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Patent number: 4619888Abstract: A heat developable light-sensitive material comprising a support and a heat developable light-sensitive layer formed thereon can produce images of high density and less fog in a short period of time and has excellent aging stability. The light-sensitive material contains as a base precursor at least one compound selected from the group consisting of compounds represented by formula [I]: ##STR1## wherein R.sup.1 and R.sup.2 individually represent hydrogen, alkyl, cycloalkyl, alkenyl, alkynyl, aryl, aralkyl, heterocyclic group, or --CO.sub.2 M wherein M represents hydrogen, alkali metal or H.Bx, and R.sup.1 and R.sup.2 can be joined together to form a ring; R.sup.3 represents hydrogen atom, alkyl, cycloalkyl, alkenyl, alkynyl, aralkyl, aryl, or heterocyclic group; x is equal to 1 when B represents a monoacidic base and equal to 1/2 when B represents a diacidic base; and C* represents an asymmetric carbon atom.Type: GrantFiled: August 26, 1985Date of Patent: October 28, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Ken Kawata, Yoshiharu Yabuki, Kouzou Sato, Hiroyuki Hirai
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Patent number: 4617257Abstract: A heat developable light-sensitive material is described, comprising a dye represented by formula (I) or (II) as described in claim 1.Type: GrantFiled: March 19, 1985Date of Patent: October 14, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Satoru Sawada, Toshinao Ukai
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Patent number: 4614702Abstract: A heat-developable color photographic material comprising a support having thereon at least a light-sensitive silver halide, a hydrophilic binder, a dye releasing redox compound capable of releasing a hydrophilic dye and a compound represented by the following general formula (IIA): ##STR1## wherein B represents an alkyl group or a substituted alkyl group; m represents 0 or an integer of 1 to 4; and A represents an alkyl group, an aryl group, a cycloalkyl group, an aralkyl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an acyl group, an alkoxycarbonyl group, an amino group, an N-substituted amino group, an acylamino group, a carbamoyl group, an N-substituted carbamoyl group, an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfonylamino group, an arylsulfonylamino group, a sulfamoyl group, an N-substituted sulfamoyl group, a cyano group, a hydroxy group, a nitro group or a halogen atom and when m represents 2 or more A may be the same or different.Type: GrantFiled: February 14, 1985Date of Patent: September 30, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Satoru Sawada, Yoshiharu Yabuki
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Patent number: 4610957Abstract: A heat-developable light-sensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion and an acid precursor having a structural moiety represented by the following formula (I) bonded to carbon atoms: ##STR1## The acid precursor is extremely stable at room temperature but when it is heated above a certain temperature, and the development proceeds to the desired appropriate condition, it releases an acid to neutralize a base, whereby the development is stopped. A heat-developable light-sensitive material containing the acid precursor provides color images having a high S/N ratio and a high image density.Type: GrantFiled: April 26, 1985Date of Patent: September 9, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Masatoshi Kato, Hiroshi Kitaguchi
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Patent number: 4603103Abstract: A heat-developable light-sensitive material comprising, on a support, a thermally decomposable organic silver salt. The heat-developable light-sensitive materials have high density and low fog.Type: GrantFiled: November 26, 1984Date of Patent: July 29, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Hirai, Kozo Sato, Hiroshi Hara
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Patent number: 4599296Abstract: A process for forming an image which comprises heating a light-sensitive material comprising a support having thereon at least a light-sensitive silver halide, a binder and a dye releasing redox compound which is reductive to the light-sensitive silver halide and capable of releasing a hydrophilic dye upon reaction with the light-sensitive silver halide by heating, after imagewise exposure or simultaneously with imagewise exposure, in a substantially water-free condition in the presence of a compound represented by the formula (A): ##STR1## wherein R.sup.1 represents a hydrogen atom or a monovalent or divalent aliphatic group; R.sup.2 and R.sup.3, which may be the same or different from each other, each represents a hydrogen atom, an aliphatic group or an aromatic group; R.sup.1 and R.sup.2 may be taken together to form a heterocyclic ring; R.sup.2 and R.sup.3 may be taken together to form a heterocyclic ring; and n represents 1 or 2, to imagewise form a mobile dye is disclosed.Type: GrantFiled: March 29, 1984Date of Patent: July 8, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Yukihiko Sakaguchi, Toshiaki Aono, Shinsaku Fujita
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Patent number: 4595652Abstract: A heat-developable light-sensitive material is described, characterized by containing a polymer having a functional group releasing a basic component upon thermal decomposition in the side chain thereof. This polymer is a new base precursor which when added to heat-developable light-sensitive materials increases their storage stability and permits them to form an image of high density and decreased in fog even after storage. Preferred examples of such polymers are polymers having a repeating unit represented by the general formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each a univalent group, L is a divalent connecting group having from 1 to 20 carbon atoms, M is a cation and x is a number equivalent with the valence of M.Type: GrantFiled: July 30, 1985Date of Patent: June 17, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Taku Nakamura, Akira Hibino, Hiroyuki Hirai
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Patent number: 4594312Abstract: Photothermographic elements containing heat bleachable acutance/antihalation dyes and thermographic elements employing heat bleachable dyes of the formula: ##STR1## in which: n is 2, 3, 4 or 5,at least one of R.sup.1 to R.sup.4 represent hydrogen and the remainder of R.sup.1 to R.sup.4 independently represent a hydrogen atom, an optionally substituted cycloalkyl group, an optionally substituted alkenyl group, an optionally substituted alkyl group, an optionally substituted aryl group, an optionally substituted heterocyclic aromatic group, or R.sup.1 and R.sup.2 together or R.sup.3 and R.sup.4 together represent the necessary atoms selected from C, N, O and S to complete a non-aromatic type ring,X.sup..crclbar. is an anion.Type: GrantFiled: March 6, 1984Date of Patent: June 10, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventors: Gebran J. Sabongi, Stephen S. C. Poon, Bernard A. Lea
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Patent number: 4587211Abstract: Certain effective leuco dyes for silver halide/silver salt/reducing agent photothermographic color imaging materials tend to bleach in the final image. The presently disclosed system of a syringaldazine and a stabilizing binder resin is more stable.Type: GrantFiled: February 1, 1985Date of Patent: May 6, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventors: Takuzo Ishida, David C. Weigel
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Patent number: 4585734Abstract: Certain effective toning systems for silver halide/silver salt/reducing agent photothermographic imaging materials tend to bleach the final image. The presently disclosed toning system of phthalazine and an active-hydrogen containing heterocyclic compound is more stable than some previous toners.Type: GrantFiled: February 1, 1985Date of Patent: April 29, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventor: David C. Weigel
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Patent number: 4584267Abstract: A thermally developable, light-sensitive material is disclosed which has at least one thermally developable, light-sensitive layer formed on a support which contains (a) a light-sensitive silver halide, (b) an organic silver salt, (c) a reducing agent and (d) a binder. Said binder contains gelatin and/or a gelatin derivative and a poly(vinyl alcohol) having a viscosity average polymerization degree of not more than 700.Type: GrantFiled: September 13, 1984Date of Patent: April 22, 1986Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Toyoaki Masukawa, Kunihiro Koshizuka
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Patent number: 4569906Abstract: A thermally developable photosensitive material containing (a) at least one organic silver compound, (b) at least one reducing agent, for said organic silver compound, (c) at least one photosensitive silver halide, and (d) at least one indan or tetralin derivative having at least two carboxyl groups. The indan and tetralin derivatives operate to suppress thermal fog.Type: GrantFiled: July 24, 1984Date of Patent: February 11, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventor: Gustav Gutman
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Patent number: 4562143Abstract: A method of forming an image by heat development of a photosensitive material comprising a support having a heat development photosensitive layer comprising imagewise exposing said layer and then bringing a non-water-permeable layer into close contact with said photosensitive layer, and heat developing said material, said photosensitive layer containing(a) an organic acid silver salt;(b) a photosensitive silver halide;(c) a reducing agent; and(d) a binder of at least one of gelatin and a gelatin derivative,said non-water-permeable layer comprising a high molecular compound selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl fluoride, polyvinyl pyrrolidone, polyvinyl chloride, polyacrylic ethyl, polymethacrylic methyl, polymethacrylic ethyl, polyvinylidene chloride, chlorinated polyethylene, chlorinated polypropylene, polycarbonate, polybutadiene, cellulose acetate, cellulose acetate butyrate, cellulose acetate propioType: GrantFiled: July 20, 1984Date of Patent: December 31, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shigeto Hirabayashi, Toyoaki Masukawa, Wataru Ishikawa
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Patent number: 4560763Abstract: A base precursor for heat-developable photosensitive material is disclosed. The precursor is comprised of a compound represented by general formula (I) or (II):(R--C.tbd.C--CO.sub.2 H).sub.x.B (I)R--C.tbd.C--CO.sub.2 H).sub.2.B.sub.y (II)The substituents within the general formulae are defined within the specification. The use of this novel base precursor makes it possible to obtain a material which is very stable at normal temperatures and which smoothly decomposes under heating at 80.degree. C. or higher in order to release a basic constituent.Type: GrantFiled: March 30, 1984Date of Patent: December 24, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Kozo Sato, Hiroyuki Hirai
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Patent number: 4558003Abstract: The addition of a boric acid or borate ion to a poly(vinyl acetal) composition has been found to cause hardening of the composition. The hardened composition is particularly useful in photothermographic emulsions having a poly(vinyl acetal) layer.Type: GrantFiled: March 12, 1984Date of Patent: December 10, 1985Assignee: Minnesota Mining and Manufacturing CompanyInventor: Kiyoshi B. Sagawa
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Patent number: 4555476Abstract: An image-forming process is disclosed. This process comprises heating a photographic material comprising a support having provided thereon at least light-sensitive silver halide, binder, and a dye releasing redox compound in the presence of a compound represented by the following general formula (A): ##STR1## wherein R.sub.1 represents a (m+n)-valent straight, branched or cyclic alkane or a (m+n)-valent straight, branched or cyclic alkene, R.sub.2 and R.sub.3, which may be the same or different, each represents a straight, branched or cyclic alkyl group or a straight, branched or cyclic alkenyl group, n represents 0, 1, 2 or 3, and m represents 0, 1 or 2, with m+n being 1 or more,after, or simultaneously with, imagewise exposure in the state of substantial absence of water to thereby imagewise form a mobile dye.Type: GrantFiled: March 29, 1984Date of Patent: November 26, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Yukihiko Sakaguchi, Toshiaki Aono, Shinsaku Fujita
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Patent number: 4555470Abstract: A heat-developable color photographic material comprising a support having thereon at least a light-sensitive silver halide, a hydrophilic binder, a dye releasing redox compound and a heat fusible compound which has a melting point of 60.degree. C. or higher and is represented by the following general formula (I), (II) or (III): ##STR1## wherein m represents an integer from 1 to 3; n represents an integer from 1 to 8; q represents an integer from 1 to 4; p represents an integer which meets the requirement for p+g=6; s represents an integer from 1 to 4; r represents an integer which meets the requirement for r+s=8; R represents a hydrogen atom or a substituent as set forth in the specification, and when m, p or r represents 2 or more, R may be the same or different; R.sub.1 represents an organic group in R.sub.1 - (OH).sub.n which is an alcohol, a phenol or a naphthol each having one or more hydroxy group and includes a saccharide; and R.sub.2 represents an organic group in R.sub.Type: GrantFiled: November 2, 1983Date of Patent: November 26, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Yukihiko Sakaguchi, Kozo Sato, Hideki Naito, Hiroshi Hara
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Patent number: 4550071Abstract: An image forming method which comprises (A) exposing to an imagewise pattern of light a light-sensitive material having on a support at least (1) a light-sensitive silver halide, (2) a binder, and (3) a compound which is chemically involved in the reduction of the light-sensitive silver halide to silver under high temperature thereby causing the production or the release of a mobile dye, (B) heating the light-sensitive material in a substantially water-free condition to form the mobile dye with an imagewise distribution subsequently to or simultaneously with the exposure, and (C) transferring the mobile dye into a dye-fixing layer under high temperature and fixing it thereto wherein an acidic component participates chemically in the reaction system for forming the mobile dye after the conclusion of the mobile dye-forming reaction to bring about the desirable effect on lowering the fog density thereof.Type: GrantFiled: April 9, 1984Date of Patent: October 29, 1985Assignee: Fuji Photo Film. Co., Ltd.Inventors: Toshiaki Aono, Koichi Nakamura
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Patent number: 4546075Abstract: A heat-developable photographic material comprising (a) an organic silver salt, (b) a photocatalyst, (c) a reducing agent, (d) a binder, and (e) at least one compound selected from the compound represented by the general formula (I) described below and the compound represented by the general formula (II) described below. ##STR1## wherein X represents a halogen atom; and R represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an acyl group, a carbamoyl group, an alkylsulfonyl group, an arylsulfonyl group, an aralkylsulfonyl group or a heterocyclic residue, ##STR2## wherein X represents a halogen atom; Z represents a sulfur atom, an oxygen atom or >N--R.sub.1 (wherein R.sub.1 represents an alkyl group, an aryl group or an acyl group; (R')n represents a substituent present on the benzene nucleus; and n represents 0 or an integer from 1 to 4.Type: GrantFiled: September 9, 1983Date of Patent: October 8, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroshi Kitaguchi, Isamu Itoh, Itsuo Fujiwara, Yasushi Nozawa, Tadayoshi Kokubo
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Patent number: 4543309Abstract: A composition suitable for application as a layer on a heat-developable image-pattern recording material to enhance the developability and stability thereof, comprising a silver salt of a benzotriazole, a reducing agent, a binder, at least one compound having the following Formula [I]: ##STR1## wherein R.sub.1 represents a hydrogen, an amino radical, or a substituted or unsubstituted alkyl, alkenyl or aryl radical; R.sub.2 represents a hydrogen, an amino alkyl, alkenyl or aryl radical is disclosed. The disclosed composition has improved developability.Type: GrantFiled: May 16, 1984Date of Patent: September 24, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shigeto Hirabayashi, Toyoaki Masukawa, Wataru Ishikawa, Tetsuya Harada
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Patent number: 4536467Abstract: A process for forming an image is described, comprising heating a light-sensitive material in a substantially water-free condition to form a mobile dye in an image pattern, said material having a support bearing thereon light-sensitive silver halide, a binder, and a dye-releasing redox compound capable of imagewise reducing the silver halide and releasing a hydrophilic dye on reaction with said silver halide when heated, after or simultaneously with imagewise exposure, in the presence of a compound having a melting point below 60.degree. C.Type: GrantFiled: March 29, 1984Date of Patent: August 20, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Yukihiko Sakaguchi, Toshiaki Aono, Shinsaku Fujita
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Patent number: 4536466Abstract: A method of forming an image comprising heating a light-sensitive material having at least a light-sensitive silver halide, a binder and a dye releasing redoc compound which is capable of reducing the light-sensitive silver halide and is capable of reacting with the light-sensitive silver halide by heating to release a hydrophilic dye on a support, under the condition substantially free from water after or simultaneously with imagewise exposure, in the presence of a compound represented by the general formula (A) described below to form imagewise a mobile dye. ##STR1## wherein R represents an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group; R.sup.1 represents an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group; R.sup.2 represents an alkyl group, an aryl group, an aralkyl group, a halogen atom or a group of R.sup.Type: GrantFiled: March 29, 1984Date of Patent: August 20, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Yukihiko Sakaguchi, Toshiaki Aono, Shinsaku Fujita
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Patent number: 4535056Abstract: A photographic construction comprises at least one spectrally-sensitized polymeric binder layer containing photographic silver halide and, in association therewitha. a non-light sensitive organic silver salt oxidizing agent,b. at least one biphenol color-forming reducing agent having the formula ##STR1## wherein each R is independently selected from a straight chain or branched alkyl or alkoxy group having 1 to 6 carbon atoms, and phenyl, and R.sup.1 is hydrogen or an alkalilabile protecting group, andc. at least one aliphatic or aromatic carboxylic acid of a specific class, which preferably is p-aminobenzoic acid, as development modifier, andd. optionally, at least one toner.Type: GrantFiled: March 15, 1984Date of Patent: August 13, 1985Assignee: Minnesota Mining and Manufacturing CompanyInventor: Robert A. Frenchik
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Patent number: 4529689Abstract: Improved heat developable silver films are produced upon coating and drying a binder composition containing (a) a substantially light-insensitive silver sulfinate, (b) a silver halide photocatalyst, and (c) a developer. A preferred film contains (a) silver hexadecylsulfinate, (b) a separately sensitized silver halide emulsion and (c) a Phenidone or Dimezone moiety in a coalesced latex binder.Type: GrantFiled: October 31, 1983Date of Patent: July 16, 1985Assignee: E. I. Du Pont de Nemours and CompanyInventor: Ross A. Lee
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Patent number: 4524128Abstract: Photographic silver halide is spectrally sensitized by means of at least one bleachable spectral sensitizing dye comprising a cyanine dye nucleus and a particular N-methylene substituent. The spectrally sensitized photographic silver halide is useful in a photothermographic material. An image in the photothermographic material, after exposure, is developed and the spectral sensitizing dye is bleached, especially at elevated pH, by heating the photothermographic material to processing temperature.Type: GrantFiled: October 24, 1983Date of Patent: June 18, 1985Assignee: Eastman Kodak CompanyInventors: Larry D. Edwards, Frederick J. Sauter, George J. Burgmaier
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Patent number: 4514493Abstract: A heat-developable light-sensitive material is described, which contains fine particles of a substantially water-insoluble base precursor incorporated in a binder. This light-sensitive material is superior in stability with the passage of time and the changes on the photographic characteristics such as maximum density, minimum density and sensitivity are less during the storage thereof.Type: GrantFiled: March 22, 1984Date of Patent: April 30, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Hirai, Kozo Sato, Ken Kawata
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Patent number: 4511650Abstract: A heat developable color light-sensitive material is disclosed. The material is comprised of a support base having thereon a light-sensitive silver halide, a binder, a dye-releasing material and a base precursor. The dye-releasing material is reductive to the light-sensitive silver halide and releases hydrophilic dye by causing a reaction with the light-sensitive silver halide by heating. The base precursor is a compound represented by the general formulae (A) and/or (B): ##STR1## wherein the substituents are defined within the specification. The material is capable of forming images by heating in a substantially water free state in order to provide high-density color images in a short period of time. The images formed have a decreased amount of fogging and higher density as compared with conventional materials. Further, the disclosed material has excellent stability when stored.Type: GrantFiled: March 16, 1984Date of Patent: April 16, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Hirai, Ken Kawata
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Patent number: 4510236Abstract: Thermally developable light sensitive material containing a light sensitive silver halide, an oxidizing agent, a reducing agent, and a combination of 2-(hydroxymethyl)-1(2H)-phthalazinone as a toning agent precursor and certain polycarboxylic acids or derivatives thereof as a catalyst for said toning agent precursor. Upon heat development of the exposed photothermographic material, the 2-(hydroxymethyl)-1(2H)-phthalazinone decomposes to form phthalazinone. The thus-formed phthalazinone acts as a toning agent for the light exposed silver halide.Type: GrantFiled: December 20, 1983Date of Patent: April 9, 1985Assignee: Minnesota Mining and Manufacturing CompanyInventor: Gustav Gutman
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Patent number: 4507380Abstract: A heat-developable color photographic material is disclosed. The material is comprised of a support having thereon a layer containing at least a photographic silver halide and the photographic material containing an organic silver salt oxidizing agent, a reducing agent, a[hydrophobic]binder and a dye releasing compound which releases a diffusible dye upon heat development. The material is characterized by a support capable of receiving a released dye or a support having thereon a layer composed of an organic high molecular weight compound which is capable of receiving a released dye. The heat-developable color photographic material can easily provide a clear and stable color image by imagewise exposure to light and a heat development procedure. A process for forming a color image using the heat-developable color photographic material is also disclosed.Type: GrantFiled: June 17, 1982Date of Patent: March 26, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideki Naito, Hiroshi Hara, Kozo Sato, Yoshiharu Yabuki
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Patent number: 4504575Abstract: Novel heat-developable (photothermographic) films incorporate a silver alkyl sulfonate as a physical developer, and an organic base to neutralize acidity from the silver sulfonate. Preferably a heat-developable film is produced by coalescing a coating composition comprising a silver alkyl sulfonate, a silver halide emulsion as photocatalyst, a reducing agent, and an aqueous latex dispersion.Type: GrantFiled: October 31, 1983Date of Patent: March 12, 1985Assignee: E. I. Du Pont de Nemours and CompanyInventor: Ross A. Lee
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Patent number: 4500626Abstract: A heat-developable color photographic material is disclosed. The material is comprised of a support having thereon a layer containing at least a light-sensitive silver halide, a hydrophilic binder, a dye releasing activator and a dye releasing compound which reduces the silver halide and releases a hydrophilic dye. The heat-developable color photographic material can easily provide a clear and stable color image by imagewise exposure to light and a heat-development procedure. A method of forming a color image using the heat-developable color photographic material is also disclosed.Type: GrantFiled: September 30, 1982Date of Patent: February 19, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideki Naito, Hiroshi Hara, Toshiaki Aono, Kozo Sato, Shinsaku Fujita
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Patent number: 4499180Abstract: A heat-developable color photographic material is disclosed. The material is comprised of a support base, a binder, a light-sensitive silver halide, a dye releasing redox compound which reduces the light-sensitive silver halide and releases a hydrophilic dye by reacting with the light-sensitive silver halide by heating; and a base precursor. The base precursor is represented by the general formula: ##STR1## wherein the substituents are defined within the specification. The material is capable of forming dye images with high density by heating the material after exposure in a substantially water free state. The images can be obtained in a short period of time and maintain their color density during storage. Further, the material produces a relatively low degree of fog based on the high degree of image density obtained.Type: GrantFiled: February 27, 1984Date of Patent: February 12, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Hirai, Ken Kawata
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Patent number: 4499172Abstract: A heat-developable color light-sensitive material comprising a support having thereon at least a light-sensitive silver halide, a binder, a dye releasing redox compound which is capable of reducing the light-sensitive silver halide and is capable of reacting with the light-sensitive silver halide by heating to release a hydrophilic dye and a salt of an alkylcarboxylic acid having a triple bond between the .alpha.-position carbon atom and the .beta.-position carbon atom with an organic base as a base precursor.The heat-developable color light-sensitive material containing the novel base precursor has good stability during preservation and provides a color image having a high color density and low fog in a short time by a simple procedure. A method of forming a color image using the heat-developable color light-sensitive material is also disclosed.Type: GrantFiled: March 30, 1984Date of Patent: February 12, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Hirai, Kozo Sato
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Patent number: 4480024Abstract: Photothermographic systems have not been useful in combination with X-ray purposes because of low speed, poor resolution and poor contrast. A particularly designed photothermographic element in combination with a rare-earth intensifying screen provides a high quality, fast, high resolution photothermographic radiographic system.Type: GrantFiled: October 21, 1983Date of Patent: October 30, 1984Assignee: Minnesota Mining and Manufacturing CompanyInventors: Thomas D. Lyons, Gregory J. McCarney
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Patent number: 4476220Abstract: Photothermographic emulsions display enhanced spectral sensitization when the silver halide grains are formed in the presence of one or more spectral sensitizing dyes.Type: GrantFiled: July 1, 1983Date of Patent: October 9, 1984Assignee: Minnesota Mining and Manufacturing CompanyInventor: Keith A. Penfound
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Patent number: 4473631Abstract: A heat-developable color photographic material is disclosed. The material is comprised of a support having thereon at least a light-sensitive silver halide, a hydrophilic binder, a dye releasing compound reductive and capable of releasing a hydrophilic dye and a compound represented by the following general formula (A): ##STR1## wherein A.sub.1, A.sub.2, A.sub.3, and A.sub.4, which may be the same or different, each represents a hydrogen atom or a substituent selected from an alkyl group, a substituted alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, a substituted aryl group and a heterocyclic group, or A.sub.1 and A.sub.2 or A.sub.3 and A.sub.4 may combine with each other to form a ring.The heat-developable color photographic material can easily provide in a short time a clear and stable color image having a high color density and low fog by imagewise exposure and heat development procedure.Type: GrantFiled: November 4, 1983Date of Patent: September 25, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Hirai, Hideki Naito, Hiroshi Hara, Kozo Sato
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Patent number: 4469773Abstract: A coupler containing in the coupling position a carbamoyloxy group ##STR1## upon oxidative coupling, releases a carbamic acid fragment that, in turn, is capable of thermally releasing ammonia or an amine. Such a carbamoyloxy substituted coupler and carbamic acid fragment are useful in imaging such as in photothermography and thermography. Ammonia or an amine released from the carbamic acid fragment enables imaging in imaging materials that are responsive to ammonia or an amine. The carbamoyloxy substituted coupler also generally is a dye-forming coupler that reacts with the oxidized form of a color developing agent to form a dye. An image is produced in an exposed photothermographic material comprising the carbamoyloxy substituted coupler by thermal development. An image is produced in a thermographic material comprising the carbamoyloxy substituted coupler and a color developing agent by imagewise heating the thermographic material.Type: GrantFiled: June 15, 1983Date of Patent: September 4, 1984Assignee: Eastman Kodak CompanyInventors: Anthony Adin, Csaba A. Kovacs, Delwyn E. Machiele
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Patent number: 4463079Abstract: A diffusion transfer heat-developable color photographic material. The material comprises a support, a photosensitive silver halide, an organic silver salt, a hydrophobic binder, a dye releasing activator, and a dye releasing redox compound which releases a diffusible dye. Color images are obtained with the material by transferring a dye released by heat development. The material makes it possible to obtain clear color images by a simple procedure and the images obtained are stable over a long period of time.Type: GrantFiled: April 30, 1982Date of Patent: July 31, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideki Naito, Hiroshi Hara, Kozo Sato
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Patent number: 4461828Abstract: A narrow range of dinuclear spectral sensitizing dyes can be used in photothermographic silver halide emulsions without adversely affecting fog and speed levels with concentration variations.Type: GrantFiled: May 13, 1983Date of Patent: July 24, 1984Assignee: Minnesota Mining and Manufacturing CompanyInventors: Kenneth W. Metz, Vincent K. Rasbury, Jack E. Reece
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Patent number: 4460681Abstract: Color photothermographic articles are prepared by having the various color-forming layers separated by organic solvent soluble barrier layers insoluble in the organic solvent used to coat at least one of the adjacent color-forming layers.Type: GrantFiled: March 15, 1983Date of Patent: July 17, 1984Assignee: Minnesota Mining and Manufacturing CompanyInventor: Robert A. Frenchik
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Patent number: 4459350Abstract: A 6-substituted-2,4-bis(trichloromethyl)-s-triazine stabilizer precursor which has a maximum absorption wavelength greater than 320 nanometers and is thermally stable at temperatures up to 150.degree. C. provides improved post-processing stability in a photothermographic silver halide material designed for dry physical development. Such a photothermographic material comprises photographic silver halide and an image forming combination comprising (i) an organic silver salt oxidizing agent, with (ii) a reducing agent for the organic silver salt oxidizing agent. A developed visible image is provided after imagewise exposure by uniformly heating the photothermographic material to moderately elevated temperatures.Type: GrantFiled: September 29, 1982Date of Patent: July 10, 1984Assignee: Eastman Kodak CompanyInventor: Wojciech M. Przezdziecki
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Patent number: 4452885Abstract: A heat-developable photographic material is disclosed. The material is comprised of (a) an organic silver salt, (b) a photocatalyst, (c) a reducing agent, (d) a binder, and (e) at least one compound selected from the group consisting of 2-trihalogenomethyl-3,4-oxadiazoles and the derivatives thereof as an antifogging agent. The use of component (e) does not present environmental pollution problems and successfully reduces fog density.Type: GrantFiled: September 29, 1982Date of Patent: June 5, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Yasushi Nozawa, Tadayoshi Kokubo, Isamu Itoh, Hiroshi Kitaguchi
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Patent number: 4452883Abstract: A photothermographic color construction is disclosed, the construction having at least two color-forming layers comprising:a. a first, spectrally-sensitized, color-forming layer coated out of a solvent system selected from lower alkyl alcohols (up to 4 carbon atoms) ketones (up to 6 carbon atoms), aromatic hydrocarbons (up to 10 carbon atoms), or mixtures thereof,b. an upper, second, different, spectrally-sensitized color-forming layer coated out of a toluene or acetone solvent system, andc.Type: GrantFiled: May 17, 1983Date of Patent: June 5, 1984Assignee: Minnesota Mining and Manufacturing CompanyInventors: Robert A. Frenchik, Kristen A. Hoff
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Patent number: 4451561Abstract: A heat-development-type image recording material comprising an organic silver salt, a reducing agent, a binder, and an amido derivative of a 5-mercapto-1,2,4-triazole or a 5-mercapto-1,3,4-thiadiazole.Type: GrantFiled: April 22, 1983Date of Patent: May 29, 1984Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shigeto Hirabayashi, Toyoaki Masukawa, Wataru Ishikawa, Tetsuya Harada
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Patent number: 4450229Abstract: The addition of a class of compounds to a photothermographic emulsion reduces latent image fade.Type: GrantFiled: May 13, 1983Date of Patent: May 22, 1984Assignee: Minnesota Mining and Manufacturing CompanyInventor: Jack E. Reece
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Patent number: 4442202Abstract: A post-activation type dry image forming material comprising (I) a silver salt component reducible to free silver upon light exposure and including silver iodide; (II) a redox reactive composition capable of making a visual change by a redox reaction of said composition, said reaction being initiated by heating in the presence of free silver; (III) an oxidizing agent for free silver which has an oxidizing capacity for free silver but is rendered photosensitive by heating and which, upon light exposure after said heating, is suppressed with respect to the oxidizing capacity for free silver and capable of catalytically promoting the redox reaction of said composition; and (IV) a photoreactive oxidizing agent, upon light exposure, capable of returning the reduced oxidizing agent for free silver to the original state.Type: GrantFiled: February 28, 1983Date of Patent: April 10, 1984Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Tetsuo Shiga, Takeo Kimura, Yoshinobu Ito, Kageyasu Akashi, Minoru Akiyama, Takeki Matsui
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Patent number: 4435499Abstract: Photosensitive silver halide grains that are thin tabular grains having an average grain thickness of less than 0.3 microns provide advantages, including improved spectral sensitization and image tone, in a photothermographic material comprising photosensitive silver halide and a photosensitive silver halide processing agent. An image is developed in such an exposed photothermographic material by heating the material, such as to a temperature within the range of about 90.degree. C. to about 180.degree. C.Type: GrantFiled: January 31, 1983Date of Patent: March 6, 1984Assignee: Eastman Kodak CompanyInventor: John W. Reeves