Heterocyclic Compound Patents (Class 430/613)
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Patent number: 6030764Abstract: A recording material comprising a support, a thermosensitive element and a protective layer therefor, the thermosensitive element comprising a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith and a binder, wherein the thermosensitive element further comprises in reactive association with the substantially light-insensitive organic silver salt and the organic reducing agent a substituted, exclusive of groups having an exclusively electron withdrawing character, or unsubstituted compound with an unsaturated 5-membered heterocyclic ring annulated with an aromatic ring system, the ring consisting of nitrogen and carbon atoms with at least one of the nitrogen atoms having a hydrogen atom and none of the carbon atoms being directly linked to a sulfur atom or being part of a carbonyl-group; a production process therefor and a thermal image recording process utilizing the recording material.Type: GrantFiled: May 14, 1997Date of Patent: February 29, 2000Assignee: Agfa-GevaertInventors: Bartholomeus Horsten, Johan Loccufier, Geert Defieuw, Luc Leenders
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Patent number: 6013429Abstract: Photographic elements are disclosed comprising a silver halide emulsion layer having associated therewith a magenta coupler and a magenta dye stabilizer compound of the formula S-I: ##STR1## wherein R.sup.0 represents an aryl group or a heterocyclic group; L.sub.1 and L.sub.2 are independently linear alkylene or cycloalkylene linking groups; and R.sup.a and R.sup.b are independently selected substituent groups at least one of which has a .sigma.* value of at least 1.8. Compounds in accordance with formula S-I act as singlet oxygen quenchers and are effective stabilizers for magenta dye images. Photographic elements of the present invention upon exposure and photographic processing yield magenta dye images that have low fading when exposed to light.Type: GrantFiled: February 27, 1998Date of Patent: January 11, 2000Assignee: Eastman Kodak CompanyInventors: Catherine A. Franke, Albert J. Mura, Jr., Shari L. Eiff
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Patent number: 6010842Abstract: A silver halide photographic light-sensitive material has at least one light-sensitive silver halide emulsion layer on a support, wherein a light-sensitive silver halide emulsion in the emulsion layer contains a compound represented by formula (I) below and a compound represented by formula (II) below. ##STR1## In formula (I), each of R.sub.1 to R.sub.3 represents a hydrogen atom, an alkyl group, or an aryl group. ##STR2## In formula (II), R represents a specific alkyl group, each of L.sub.1 and L.sub.2 represents a methine group, p.sub.1 represents 0 or 1, Z.sub.1 represents atoms required to form a 5- or 6-membered nitrogen-containing heterocyclic ring, M.sub.1 represents a charge-balancing counter ion, m.sub.1 represents a number from 0 to 10 required to neutralize electric charge of a molecule, and Q represents a methine group or a polymethine group substituted by a heterocyclic group or an aromatic group.Type: GrantFiled: August 29, 1997Date of Patent: January 4, 2000Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoichi Suga, Masato Taniguchi
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Patent number: 5998124Abstract: A method for producing a photographic silver halide emulsion containing silver halide grains having a silver chloride content of 50 mol % or more and at least 30% of the surface area of the grains comprising [111] faces is disclosed, wherein the silver halide grains are formed in the presence of at least one kind of compounds represented by formula (I): ##STR1## wherein R.sub.1 represents an alkyl group, an alkenyl group, or an aralkyl group; R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 each represents a hydrogen atom or a group capable of substituting for the hydrogen atom, R.sub.2 and R.sub.3, R.sub.3 and R.sub.4, R.sub.4 and R.sub.5, and R.sub.5 and R.sub.6 each may be ring-condensed, provided that at least one of R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 represents an aryl group; and X.sup.- represents a counter anion.Type: GrantFiled: April 7, 1997Date of Patent: December 7, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsuhisa Ohzeki, Shoji Ishiguro, Tetsuro Kojima, Yasuhiro Mitamura
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Patent number: 5994051Abstract: This invention comprises a photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula X--H, wherein X is an electron donor moiety to which a base, B.sup.-, is covalently linked and H is a leaving hydrogen atom, and wherein:1) X--H has an oxidation potential between 0 and about 1.4 V; and2) the oxidized form of X--H undergoes deprotonation reaction with the base B.sup.-, to give the radical X.sup..cndot. and the protonated base B-H.In a preferred embodiment of the invention, the radical X.cndot. has an oxidation potential <-0.7V.Type: GrantFiled: July 17, 1998Date of Patent: November 30, 1999Assignee: Eastman Kodak CompanyInventors: Ian R. Gould, Samir Farid, Stephen A. Godleski, Jerome R. Lenhard, Annabel A. Muenter, Paul A. Zielinski
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Patent number: 5989801Abstract: The present invention provides a silver halide photographic material and an image forming method for obtaining a monochrome image using a dye image even if it is treated with a color developer free of benzyl alcohol; a photographic property of the monochrome image is less deteriorated by a toxic gas such as formaldehyde and an increase in sensitization and fog with time is improved.Type: GrantFiled: August 26, 1998Date of Patent: November 23, 1999Assignee: Oriental Photo Industrial Co., Ltd.Inventors: Toshio Hirosawa, Kouji Katsube, Toshiko Nakamura, Yoshiro Hayafuchi, Katsuyuki Arasawa
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Patent number: 5981156Abstract: A method of making a thermally processable imaging element which comprises:i) forming a solution of poly(vinyl alcohol) in water;ii) adding matte particles to the resulting aqueous medium;iii) adding a compound of the formula I or formula II to the aqueous medium in an amount sufficient to inhibit agglomeration of the matte particles: ##STR1## wherein: the substituents are as described in the specification; iv) coating an image recording layer onto one side of a support;v) coating the aqueous medium containing the matte particles as an overcoat layer over the image recording layer or as backing layer on the side of the support opposite the image recording layer.Type: GrantFiled: August 20, 1997Date of Patent: November 9, 1999Assignee: Eastman Kodak CompanyInventors: Sharon M. Melpolder, Peter J. Cowdery-Corvan, Alfred J. Alton
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Patent number: 5981161Abstract: A silver halide photographic light sensitive material is diclosed, comprising a support having a silver halide emulsion layer containing cubic silver halide grains containing iodide of 0.1 to 1.0 mol % and an iridium salt of 1.times.10.sup.-8 to 1.times.10.sup.Type: GrantFiled: June 20, 1997Date of Patent: November 9, 1999Assignee: Konica CorporationInventor: Yuji Hosoi
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Patent number: 5972589Abstract: The present invention relates to a method for manufacturing a silver halide photographic emulsion comprising a nucleation step, a growing step and a washing step, wherein a reduction sensitization is performed between said growing step and said washing step in the presence of a sulfuring agent and a stabilizer. According to a preferred embodiment a fine grain silver halide emulsion is added either between the addition of stabilizer and the addition of sulfuring agent or between the addition of sulfuring agent and the start of reduction sensitization or both.Type: GrantFiled: October 22, 1997Date of Patent: October 26, 1999Assignee: Imation CorporationInventors: Jouri Breslav, Maria Stella Garozzo
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Patent number: 5968725Abstract: A photothermographic material comprising a photosensitive silver halide, an organic silver salt, a reducing agent, and an ultrahigh contrast promoting agent, typically a hydrazine derivative. In one embodiment, a compound having a group for promoting adsorption to the silver halide is contained for suppressing occurrence of pepper fog. In another embodiment, a 5- or 6-membered heterocyclic mercapto compound having at least two nitrogen atoms or a tetraazaindene compound is contained for suppressing a change of photographic properties, typically image enlargement with a variation of developing conditions. In either case, the photothermographic material can form super-high contrast images of quality.Type: GrantFiled: April 24, 1997Date of Patent: October 19, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazunobu Katoh, Minoru Sakai
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Patent number: 5962208Abstract: A silver halide color photographic material comprises at least one silver halide emulsion layer on a reflex support silver halide grains containing at least 90 mol % silver chloride and having a silver bromide-rich region in the vicinity of at least one grain corner, but having an average silver bromide content of 15 mol % or less at the grain surface, (ii) at least one yellow coupler represented by the following general formula (I); and (iii) at least one compound represented by the following general formula (II): ##STR1## wherein R.sub.1 represents an aryl group or a tertiary alkyl group; R.sub.2 represents a fluorine atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, a dialkylamino group, an alkylthio group, or an arylthio group; R.sub.Type: GrantFiled: May 28, 1997Date of Patent: October 5, 1999Assignee: Fuji Photo Film Co., Ltd.Inventor: Kazunori Hasebe
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Patent number: 5958668Abstract: A recording medium comprising a support having thereon a recording layer comprising an organic silver salt, a developing agent for the organic silver salt, a water-soluble binder and an antifoggant in an amount of from 10 mol % to 40 mol % based on the organic silver salt. The recording material has a long shelf life and provides a high-density image.Type: GrantFiled: May 21, 1997Date of Patent: September 28, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Hirotaka Matsumoto, Kimi Ikeda, Hisashi Okada
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Patent number: 5958665Abstract: A sultone compound represented by formula (I) or (I'), a quaternary salt compound represented by formula (II) or (II'), a methine compound represented by formula (III) or (III'), production processes thereof and a silver halide photographic light-sensitive material comprising a quaternary salt compound represented by formula (II) or (II') and/or a methine compound represented by formula (III) or (III') are disclosed.Type: GrantFiled: October 3, 1997Date of Patent: September 28, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Takanori Hioki, Tetsuya Watanabe
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Patent number: 5952167Abstract: A photothermographic material comprising (a) a reducible silver source, (b) a photocatalyst, (c) a reducing agent, (d) a binder, and (e) a compound represented by the following formula (I): wherein Q represents an atomic group necessary to form a six-membered heterocycle containing two to four nitrogen atoms; Y represents --CO--, --SO--, or --SO.sub.2 --; X.sub.1 and X.sub.2 each represent a halogen atom; and A represents a hydrogen atom or an electron withdrawing group, the photothermographic material exhibiting low fogging without deterioration in image tone and sensitivity decrease.Type: GrantFiled: March 5, 1997Date of Patent: September 14, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Hisashi Okada, Naoki Asanuma, Ichizo Toya
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Patent number: 5939248Abstract: A photothermographic material having a photosensitive medium comprising: photosensitive silver halide, a reducible silver source, a reducing agent for silver ion, a hydrobromic acid salt of a nitrogen-containing heterocyclic ring or fused ring nucleus associated with a pair of bromine atoms CHARACTERIZED IN THAT the photosensitive medium additionally comprises as an antifoggant, substantially in the absence of an antifoggant effective amount of mercury and other heavy metal salts, a tribromomethyl ketone compound of general formula (I): ##STR1## in which; R represents an alkyl group, an aryl group, a carbocyclic ring or fused ring nucleus or a heterocyclic ring or fused ring nucleus.Type: GrantFiled: September 24, 1993Date of Patent: August 17, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventors: Mark P. Kirk, David B. Oliff
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Patent number: 5939247Abstract: The present invention provides a silver halide photographic material which can give a black-and-white picture by the use of dye images even when processed with a color developer substantially free from benzyl alcohol, and little suffers from the deterioration of photographic characteristics by harmful gas such as formaldehyde; and a process for forming images.Specifically, a silver halide photographic material comprising a base and at least one silver halide emulsion layer formed on the base, wherein the silver chloride content of the grainy silver halide constituting the silver halide emulsion layer is 95 mole % or above; the silver halide emulsion layer contains a yellow coupler, a magenta coupler and a cyan coupler; and the silver halide emulsion layer and/or other hydrophilic colloid layer contains a specific compound; and a process for forming images which comprises processing this silver halide photographic material with a color developer substantially free from benzyl alcohol.Type: GrantFiled: June 26, 1998Date of Patent: August 17, 1999Assignee: Oriental Photo Industrial Co., Ltd.Inventors: Toshio Hirosawa, Kouji Katsube, Toshiko Nakamura, Yoshiro Hayafuchi, Katsuyuki Arasawa, Junichi Komiyama, Tsuyoshi Fujita, Noboru Sonda
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Patent number: 5935773Abstract: A colour photographic silver halide material with a support, at last one silver halide emulsion layer containing at least one yellow coupler and at least one silver halide emulsion layer containing a cyan coupler applied thereon, in which material the silver halide emulsion layer, of which there is at least one, containing at least one yellow coupler and/or the silver halide emulsion layer, of which there is at least one, containing at least one cyan coupler contains a compound of the formula (I) ##STR1## in which R.sub.1, R.sub.2, R.sub.3 mean alkyl, alkenyl or acyl andn means 6, 7 or 8,is distinguished by improved stability of the image dyes produced by processing.Type: GrantFiled: April 29, 1996Date of Patent: August 10, 1999Assignee: Agfa-Gevaert AGInventors: Jorg Hagemann, Gunter Helling
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Patent number: 5935772Abstract: A silver halide photographic light-sensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer and at least one light-insensitive layer, wherein at least one of the at least one of light-sensitive silver halide emulsion layer is a light-sensitive silver halide emulsion layer in which 50% or more of the entire projected area of all silver halide grains are tabular silver halide grains having an aspect ratio of 2.0 or more, at least a part of the tabular silver halide grains contains a desensitizer, and the light-sensitive material contains a compound represented by formula (A-I), (A-II) or (A-III); and a package obtained by housing the light-sensitive material in a specific cartridge.Type: GrantFiled: November 21, 1996Date of Patent: August 10, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroshi Tamaoki, Keiji Mihayashi
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Patent number: 5928850Abstract: A silver halide photographic light-sensitive material is disclosed. The light-sensitive material comprises a dispersion material which is obtained by emulsifying a mixture of a yellow coupler represented by the formula and a polymer compound that is insoluble in water and soluble in an organic solvent.Type: GrantFiled: February 18, 1997Date of Patent: July 27, 1999Assignee: Konica CorporationInventors: Kazuhiro Murai, Shigeo Tanaka, Kunimasa Hiyama
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Patent number: 5928852Abstract: A silver halide photographic emulsion is disclosed, comprising a support having thereon at least one silver halide emulsion layer, wherein the silver halide grain contained in the silver halide emulsion layer has a silver chloride content of 50 mol % or more, 30% or more of the surface area of the grain comprises a (111) face, and the silver halide grain is formed in the presence of at least one compound represented by formula (I) and contains a hexacyano complex represented by formula (II) such that the outermost layer of the grain has a hexacyano complex concentration of at least 1.times.10.sup.-4 mol/mol-Ag.Type: GrantFiled: October 10, 1996Date of Patent: July 27, 1999Assignee: Fuji Photo Film Co., Ltd.Inventor: Katsuhisa Ohzeki
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Patent number: 5925509Abstract: A silver halide photographic material having improved heat sensitivity comprises a red sensitive silver halide emulsion layer the silver halide of which is prepared in the presence of a hexacoordination complex of rhenium, ruthenium or osmium with at least four cyanide ligands and comprising at least about 90 mole percent silver chloride, wherein the emulsion contains at least one red sensitizing dye.Type: GrantFiled: April 8, 1996Date of Patent: July 20, 1999Assignee: Eastman Kodak CompanyInventors: Richard Paul Garnsey, Pamela McCue Ferguson, Richard Lee Parton, Paul Timothy Hahm
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Patent number: 5922525Abstract: A silver halide photographic material having improved heat sensitivity comprises a red sensitive silver halide emulsion layer the silver halide of which is prepared in the presence of a hexacoordination complex of rhenium, ruthenium or osmium with at least four cyanide ligands and comprising at least about 90 mole percent silver chloride, wherein the emulsion contains a thiosulfonate and a sulfinate or seleninate and at least one red sensitizing dye.Type: GrantFiled: April 8, 1996Date of Patent: July 13, 1999Assignee: Eastman Kodak CompanyInventors: Richard Paul Garnsey, Pamela McCue Ferguson, Richard Lee Parton, Paul Timothy Hahm
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Patent number: 5922526Abstract: A color photographic recording material having at least one light-sensitive silver halide emulsion layer, the silver halide emulsion whereof is spectrally sensitized with a cyanine dye of the formula I, exhibits increased sensitivity, ##STR1## R.sup.1, R.sup.2, R.sup.3, R.sup.6 to R.sup.9 are H, halogen, alkyl, methoxy, aryl, 1-pyrrolyl, 2-pyrrolyl, 3-pyrrolyl, 2-furanyl, 3-furanyl, 2-thienyl, 3-thienyl, 1-indolyl, 2-isoindolyl or N-carbazolyl; or R.sup.7 together with R.sup.6 or R.sup.8 denote the group required to complete an optionally substituted fused benzene ring or napthylene ring system;R.sup.4 and R.sup.5 are alkyl, sulphoalkyl, carboxyalkyl, --(CH.sub.2).sub.n --SO.sub.2 --NH--SO.sub.2 -alkyl, --(CH.sub.2).sub.n --SO.sub.2 --NH--CO-alkyl, --(CH.sub.2).sub.n --CO--NH--SO.sub.2 -alkyl, or --(CH.sub.2).sub.n --CO--NH--CO-alkyl;X denotes --O--, --S--, --Se--, or --NR.sup.10 (R.sup.10 =optionally substituted alkyl);L.sup.1, L.sup.2, L.sup.Type: GrantFiled: November 4, 1997Date of Patent: July 13, 1999Assignee: Agfa-Gevaert AGInventor: Michael Missfeldt
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Patent number: 5922527Abstract: A black-and-white, negative-acting, silver halide emulsion is described which gives improved image tone when used in a photographic element. The toning agents are based on dithio-substituted compounds having the following general structures: ##STR1## where R.sub.1 and R.sub.2, independently, are selected from the group consisting of alkyl, aryl and heterocyclic groups, or R.sub.1 and R.sub.2 together complete a ring;n and m are integers from 1 to 5; Y is a hydrogen; R.sub.3 is a hydrogen or alkyl group;and X is selected from the group consisting of O, S, N--OH and N--N(R).sub.2, where R is a hydrogen or alkyl group.Type: GrantFiled: July 15, 1997Date of Patent: July 13, 1999Assignee: Imation Corp.Inventors: Charles G. Barlow, Richard R. Ollmann, Alexis S. Zinn-Warner, Robert J. D. Nairne, A. L. Beck, Andrew Mott
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Patent number: 5922529Abstract: A photothermographic material has a photosensitive layer containing a binder, organic silver salt, reducing agent, and silver halide on one surface of a support. The photosensitive layer further contains a specific sulfur-containing compound and a merocyanine dye of specific structure and has an absorbance of 0.15-1.0 at an exposure wavelength. Sharpness, sensitivity, and aging stability are improved.Type: GrantFiled: December 23, 1997Date of Patent: July 13, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Hirohiko Tsuzuki, Hisashi Okada, Yoshio Inagaki
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Patent number: 5919612Abstract: A colour photographic silver halide material having a support and at least one silver halide emulsion layer, which contains a sensitiser of the formula (I), a stabiliser of the formula (II) and a stabiliser of the formula (III) ##STR1## in which R.sub.1 to R.sub.14, X.sub.1, X.sub.2, X.sup..crclbar., L.sub.1 to L.sub.5 and n have the meaning stated in the description, is distinguished by improved storage stability.Type: GrantFiled: January 17, 1997Date of Patent: July 6, 1999Assignee: Agfa-Gevaert AGInventors: Cuong Ly, Wolfgang Schmidt, Bruno Mucke, Michael Missfeldt
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Patent number: 5910402Abstract: A photosensitive element which comprises a support, at least one silver halide emulsion layer and at least a non-light sensitive hydrophilic colloidal layer, wherein the silver halide emulsion layer comprises a selenium compound represented by formula (1): ##STR1## wherein: Q represents R.sup.1 SO.sub.2 or R.sup.2 R.sup.3 P=X;each of R.sup.1, R.sup.2 and R.sup.3 the same or different represents OR.sup.4, NR.sup.5 R.sup.6, SR.sup.7, SeR.sup.8 an alkyl group, an aryl group or a heteroaryl group;X represents O, S or Se;each of R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 the same or different represents hydrogen, an alkyl group, an aryl group or a heteroaryl group, or R.sup.5 and R.sup.6 together represents the atoms necessary to form a N-containing ring.The invention also provides a method for the preparation of a photosensitive element as disclosed hereinbefore comprising the step of chemically sensitizing at least one of the silver halide emulsions by means of a selenium compound as defined.Type: GrantFiled: May 26, 1998Date of Patent: June 8, 1999Assignee: AGFA-Gevaert, N.V.Inventors: Rene De Keyzer, Johan Loccufier, Kathy Elst
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Patent number: 5908741Abstract: A photographic silver halide material in which the silver halide emulsion layer of at least one silver halide emulsion layer is stabilized with a compound of the formula (I):Ar--Se--X (I)in whichAr means a carbocyclic or heterocyclic aromatic group which has an electron-attracting grouping in o-position relative to the Se andX means a further substituted heteroatom,exhibits a smaller reduction in sensitivity, in particular under tropical conditions of storage.Type: GrantFiled: August 21, 1996Date of Patent: June 1, 1999Assignee: Agfa-Gevaert AGInventors: Peter Bergthaller, Hans-Ulrich Borst, Johannes Willsau, Ralf Buscher, Peter Bell
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Patent number: 5891615Abstract: Chemical sensitization of silver halide photothermographic emulsions used in photothermographic elements, can be effected by the decomposition of sulfur containing compounds on or around the surface of the silver halide grains, usually under oxidizing conditions at elevated temperatures. Alignment of the sulfur containing compounds on the surface of the grains, can be accomplished with spectral sensitizing dyes and appears to be particularly effective in providing strong chemical sensitization effects.Type: GrantFiled: April 8, 1997Date of Patent: April 6, 1999Assignee: Imation Corp.Inventors: John M. Winslow, Gary L. Featherstone, Doreen C. Lynch, James R. Miller, Sharon M. Simpson, Mark C. Skinner
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Patent number: 5879872Abstract: This invention relates to a silver halide photographic element comprising a silver halide emulsion precipitated and/or chemically sensitized in the presence of an sulfenimide compound represented by the formula: ##STR1## wherein M represents the atoms necessary to form, with R.sup.1 and R.sup.2, a five or six-membered ring or a multiple ring system; w is 1 or 0, wherein when w is 0, R.sup.1 and R.sup.2 are independently substituted or unsubstituted aliphatic, aromatic or heterocyclic groups, and when w is 1, R.sup.1 and R.sup.2 are independently carbonyl or sulfonyl groups; R.sup.3 is independently a substituted or unsubstituted aliphatic, aromatic or heterocyclic group and x is 0 or 1.Type: GrantFiled: May 16, 1997Date of Patent: March 9, 1999Assignee: Eastman Kodak CompanyInventors: Franklin D. Saeva, Roger L. Klaus, Jerzy Z. Mydlarz
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Patent number: 5874207Abstract: A direct-positive silver halide light-sensitive material comprising a support having thereon at least one pre-fogged light-sensitive silver halide emulsion layer, wherein the light-sensitive material comprises a specific onium salt compound in the emulsion layer or a hydrophilic protective colloid layer adjacent thereto. Also disclosed is a method of preparing a pre-fogged light-sensitive silver halide emulsion for use in the light-sensitive material.Type: GrantFiled: May 16, 1997Date of Patent: February 23, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Isao Oyagi, Shingo Nishiyama, Nobuaki Inoue
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Patent number: 5871898Abstract: A silver halide photographic emulsion is disclosed, which is chemically sensitized with a compound having an adsorptive group onto silver halide and a labile sulfur moiety, and further a silver halide photographic material using the same emulsion is disclosed.Type: GrantFiled: August 5, 1996Date of Patent: February 16, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Mifune, Tetsuro Kojima
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Patent number: 5869229Abstract: A photothermographic material contains a compound of formula (I): ##STR1## wherein X represents --N.dbd., --N(R)--, --O--or --S--wherein R represents hydrogen, hydroxy, aliphatic hydrocarbon, aryl or heterocyclic group, Z represents a valence bond or a group of non-metallic atoms necessary to form a 5 to 7-membered ring with X, and each of Q.sub.1 and Q.sub.2 represents a group of non-metallic atoms necessary to form an aromatic hydrocarbon ring or aromatic heterocycle fused to the ring completed by Z. The material has high sensitivity in the infrared region and a minimal sensitivity change with varying storage conditions.Type: GrantFiled: September 9, 1997Date of Patent: February 9, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Hisashi Okada, Naoki Asanuma, Ryo Suzuki, Shiegeo Hirano
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Patent number: 5866313Abstract: A silver halide photographic light-sensitive material having at least one light-sensitive silver halide emulsion layer, on a support, and comprising a reducing agent for color formation of carbamoyl-substituted hydrazine, a dye-forming coupler and at least one photographic stabilizer selected from five groups of compounds.Type: GrantFiled: November 29, 1996Date of Patent: February 2, 1999Assignee: Fuji Photo Film Co., Ltd.Inventor: Katsumi Hirano
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Patent number: 5858640Abstract: This invention provides a thermally processable imaging element comprising a support and a thermographic or photothermographic imaging layer, said imaging layer comprising a sulfenimide compound represented by the formula: ##STR1## wherein M represents the atoms necessary to form, with R.sup.1 and R.sup.2, a five or six-membered ring or a multiple ring system; w is 1 or 0, wherein when w is 0, R.sup.1 and R.sup.2 are independently substituted or unsubstituted aliphatic, aromatic or heterocyclic groups, and when w is 1, R.sup.1 and R.sup.2 are independently carbonyl or sulfonyl groups; R.sup.3 is independently a substituted or unsubstituted aliphatic, aromatic or heterocyclic group and x is 0 or 1.In one embodiment the thermally processable imaging element comprises:(a) photographic silver halide, and(b) an image-forming combination comprising(i) an organic silver salt oxidizing agent, with(ii) a reducing agent for the organic silver salt oxidizing agent.Type: GrantFiled: May 16, 1997Date of Patent: January 12, 1999Assignee: Eastman Kodak CompanyInventors: Peter J. Cowdery-Corvan, Roger L. Klaus, Franklin D. Saeva
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Patent number: 5851753Abstract: A silver halide photographic laight-sensitive material is disclosed. The light-sensitive material comprises a support and a silver halide emulsion layer and a non-light-sensitive hydrophilic colloid layer provided on the support, wherein at least one of the silver halide emulsion layer and the non-light-sensitive hydrophilic colloid layer contains a compound represented by the following Formula 1, and the silver halide emulsion layer contains tabular silver halide grains having an average aspect ratio of not less than 2.0 account for at least 50 % of total grain projected area of the emulsion, and the tabular grains have an average silver iodide content is not more than 1 mole-%;Formula 1R.sub.11 --(S).sub.n --R.sub.12wherein R.sub.11 and R.sub.12 are each independently represent an aliphatic group, an aromatic group or a heterocyclic group, the groups represented by R.sub.11 and R.sub.12 may be the same or different and they may be bonded with together to form a ring; and n is an integer of from 2 to 6.Type: GrantFiled: October 8, 1996Date of Patent: December 22, 1998Assignee: Konica CorporationInventors: Taketoshi Yamada, Norio Miura, Naoyo Suzuki, Hiroshi Kashiwagi, Hideki Takiguchi
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Patent number: 5851754Abstract: A silver halide photographic material is disclosed, comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein said silver halide photographic material contains a compound by formula (IA), or which contains at least one hydroxamic acid compound having a bicyclo ring as a partial structure and represented by formula (IB).Type: GrantFiled: June 6, 1996Date of Patent: December 22, 1998Assignee: Fuji Photo Film Co., Ltd.Inventors: Hisashi Mikoshiba, Hiroo Takizawa, Junichiro Hosokawa, Yoshio Ishii, Keiji Mihayashi, Masakazu Morigaki, Mamoru Sakurazawa
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Patent number: 5851751Abstract: A silver halide emulsion of average grain size 0.2 .mu.m or less comprising silver halide grains having a core and an outer shell, the core comprising at least 85 mol % of the total silver halide content of the grain and at least 50 mol % of the silver halide in the core being silver bromide, and the outer shell comprising silver halide of which greater than 50 mol % is silver chloride; the emulsion either containing no rhodium dopant, or containing rhodium dopant such that the concentration of said dopant is at least as great in the core as in the shell.Type: GrantFiled: January 21, 1997Date of Patent: December 22, 1998Assignee: Imation Corp.Inventors: Julian M. Wallis, Robert J. D. Nairne, Alexis Zinn-Warner
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Patent number: 5837436Abstract: A silver halide color photographic light-sensitive material comprising a support having on one surface thereof at least one light-sensitive silver halide emulsion layer and at least one light-insensitive layer, wherein the silver halide color photographic light-sensitive material contains at least one compound selected from the compounds represented by formulae (A-I), (A-II) and (A-III) and a coupler represented by formula (m).Type: GrantFiled: July 26, 1996Date of Patent: November 17, 1998Assignee: Fuji Photo Film Co., Ltd.Inventors: Keiji Mihayashi, Mamoru Sakurazawa
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Patent number: 5814439Abstract: In a silver halide color photographic photo-sensitive material comprising a reflective support having thereon photographic structural layers comprising one or more silver halide emulsion layers, pH of a coating of the silver halide color photographic photo-sensitive material ranges from 4.0 to 6.5 and at least one of the silver halide emulsion on layers contains at least one mercapto heterocyclic compound and tabular silver halide grains having {100} planes was main planes and having a silver chloride content of not less than 80 mol %, the silver halide grains containing at least one selected from the group consisting of metal complexes of Fe, Ru, Re, Os, Rh and Ir.Type: GrantFiled: October 29, 1996Date of Patent: September 29, 1998Assignee: Fuji Photo Film Co., Ltd.Inventors: Naoto Ohshima, Mitsuo Saitou
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Patent number: 5804364Abstract: A method for producing a silver halide emulsion containing silver halide grains having a mean grain size of 0.15 .mu.m or less, wherein at least a part or the whole of a silver halide grain formation process is performed in the presence of an imidazole compound.Type: GrantFiled: May 17, 1996Date of Patent: September 8, 1998Assignee: Fuji Photo Film Co., Ltd.Inventor: Hiroshi Takehara
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Patent number: 5792601Abstract: A radiation sensitive emulsion is disclosed containing iridium doped composite silver halide grains comprised of (a) host portions having an average aspect ratio of less than 1.3 and consisting essentially of monodisperse silver iodochloride grains containing from 0.05 to 3 mole percent iodide, based on total silver forming the host portions, with maximum iodide concentrations located nearer the surface of the host portions than their center and (b) epitaxially deposited portions containing the iridium dopant and silver bromide accounting for from 0.1 to 5 mole percent of total silver forming the composite grains.The emulsions are prepared by (a) first providing an emulsion containing grains which form the host portions of the grains and (b) modifying the performance properties of the host grains by a combination of silver bromide addition, iridium dopant incorporation and antifoggant addition, in which, prior to antifoggant addition, silver bromide in the amount of from 0.1 to 5.Type: GrantFiled: July 29, 1996Date of Patent: August 11, 1998Assignee: Eastman Kodak CompanyInventors: James Lawrence Edwards, Benjamin Teh-Kung Chen, Eric Leslie Bell, Roger Lok
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Patent number: 5773208Abstract: The invention relates to an emulsion comprising silver halide grains, said grains being tabular and comprising sensitizing dye(s) and silver salt epitaxial deposits, and addenda that includea tetraazaindene and a hexose reductone represented by Formula I: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different, and may represent H, alkyl, cycloalkyl, aryl, or an alkyl group with a solubilizing group such as --OH, sulfonamide, sulfamoyl, or carbamoyl. Alternatively, R.sub.1 and R.sub.2 may be joined to complete a heterocyclic ring such as aziridinyl, azetidinyl, pyrrolidinyl, piperidinyl, morpholinyl, piperazinyl, or pyridinyl, R.sub.4 and R.sub.5 are H, OH, alkyl, aryl, cycloalkyl, or may together represent an alkylidene group, n is 0,1, or 2 and R.sub.3 is H, alkyl, aryl, or CO.sub.2 R.sub.6 where R.sub.6 is alkyl.Type: GrantFiled: November 27, 1996Date of Patent: June 30, 1998Assignee: Eastman Kodak CompanyInventors: Jeffrey L. Hall, James H. Reynolds
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Patent number: 5756278Abstract: The invention relates to a silver halide photographic emulsion comprising a silver halide emulsion wherein the grains of said emulsion comprise silver chloride said grains are sensitized with a water soluble gold(I) or (III) compound, and said emulsion further comprises a dithiolone dioxide.Type: GrantFiled: June 30, 1997Date of Patent: May 26, 1998Assignee: Eastman Kodak CompanyInventor: Roger Lok
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Patent number: 5747235Abstract: A photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula: ##STR1## wherein A is a silver halide adsorptive group that contains at least one atom of N, S, Se, or Te that promotes adsorption to silver halide, and L represents a linking group containing at least one C, N, S or O atom, k is 1 or 2, and XY is an fragmentable electron donor moiety in which X is an electron donor group and Y is a leaving group other than hydrogen, and wherein:1) XY has an oxidation potential between 0 and about 1-4 V; and2) the oxidized form of XY undergoes a bond cleavage reaction to give the radical X.sup..cndot. and the leaving fragment Y.In a preferred embodiment of the invention, the radical X.sup..cndot. has an oxidation potential .ltoreq.-0.7V.Type: GrantFiled: October 30, 1996Date of Patent: May 5, 1998Assignee: Eastman Kodak CompanyInventors: Samir Y. Farid, Jerome R. Lenhard, Chin H. Chen, Annabel A. Muenter, Ian R. Gould, Stephen A. Godleski, Paul A. Zielinski
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Patent number: 5731141Abstract: The present invention describes a light-sensitive silver halide photographic material comprising a support and silver halide emulsion layer or layers, wherein at least one of said silver halide emulsion layers contains tabular silver halide grains having an average diameter to thickness ratio of at least 2:1 and at least one azodicarbonamide derivative.Type: GrantFiled: May 21, 1996Date of Patent: March 24, 1998Assignee: Imation Corp.Inventors: Isabella Cogliolo, Ivano Delprato, Luca Ceruti, Stefano Mana, Stefano Parodi
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Patent number: 5731139Abstract: A silver halide photographic light sensitive material comprises a support and provided thereon, a light sensitive silver halide emulsion layer, wherein said light sensitive silver halide emulsion layer or another layer contains an organic compound having a boron atom bonding to at least two oxygen atoms.Type: GrantFiled: March 8, 1996Date of Patent: March 24, 1998Assignee: Konica CorporationInventors: Masaki Nakamura, Nobuaki Kagawa, Yoshihiko Suda
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Patent number: 5726005Abstract: A photographic print element is disclosed having a reflective support and at least one image recording emulsion layer unit containing cube-like silver iodochloride grains containing from 0.05 to 3 mole percent iodide, based on total silver, in a controlled, non-uniform iodide distribution forming a core, an iodide-free surface shell having a thickness of greater than 50 .ANG., and a sub-surface shell that contains a maximum iodide concentration.Type: GrantFiled: May 17, 1996Date of Patent: March 10, 1998Assignee: Eastman Kodak CompanyInventors: Benjamin Teh-Kung Chen, James Lawrence Edwards, Roger Lok, Sanford Howard Ehrlich
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Patent number: 5723617Abstract: A series of novel pyrrolo?2,1-a!isoquinoline dyes has been prepared using readily available starting materials via a simple synthetic pathway. These dyes have narrow absorption bands in the range of 500-900 nm. Those that absorb in the near-infrared region (700-1400 nm) lack significant absorption in the 300-400 nm ultraviolet region of the spectrum; this is an advantage for use in an applications such as imaging setting film. In addition, the greater thermal and chemical stability of these dyes in comparison to their indolizine analogues should be valuable in many applications.Type: GrantFiled: December 21, 1995Date of Patent: March 3, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventor: Gregory D. Cuny
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Patent number: 5719007Abstract: A silver halide color photographic material is described, which comprises a support having thereon at least one blue-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer, at least one red-sensitive silver halide emulsion layer and at least one light-insensitive layer, wherein one or more of the above layers contains at least one compound represented by formula (A-I), (A-II), (A-III), (A-IV) or (A-V) and one or more of the above layers contains at least one compound represented by formula (H): ##STR1##Type: GrantFiled: January 29, 1996Date of Patent: February 17, 1998Assignee: Fuji Photo Film Co., Ltd.Inventors: Mamoru Sakurazawa, Hisashi Mikoshiba, Masakazu Morigaki