Polyhetero Atom Ring Patents (Class 430/614)
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Patent number: 6368778Abstract: Photothermographic materials provide images having improved image stability due to the presence of certain image stabilizing compounds in a silver-containing layer. These image stabilizing compounds are fluorenone, fluorene, coumarin, naphthalic acid imide, pyrazoline, or anthracene compounds. In particular, they reduce image browning that may occur from the presence of various components in the materials.Type: GrantFiled: August 15, 2000Date of Patent: April 9, 2002Assignee: Eastman Kodak CompanyInventors: Steven H. Kong, Paul G. Skoug, Kumars Sakizadeh
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Patent number: 6368782Abstract: A photothermographic material comprising, on one side of a support, at least one kind of photosensitive silver halide, a light insensitive silver salt of an organic acid, a reducing agent for silver ions and a binder, wherein the photosensitive silver halide has a mean grain size of 0.001 &mgr;m to 0.06 &mgr;m and the material comprises at least two kinds of organic polyhalogenated compounds at least one of which is an organic polyhalogenated compound represented by the following formula (1): wherein Z1 and Z2 independently represent a halogen atom, X1 represents a hydrogen atom or an electron withdrawing group, Y1 represents —CO— group or —SO2— group, Q represents an arylene group or a divalent heterocyclic group, L represents a bridging group, W1 and W2 independently represent a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, and n represents 0 or 1.Type: GrantFiled: August 24, 2000Date of Patent: April 9, 2002Assignee: Fuji Photo Film Co., Ltd.Inventors: Kouta Fukui, Masaru Takasaki, Katsuyuki Watanabe
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Publication number: 20020039709Abstract: A silver halide color photographic lightsensitive material comprises a support and a silver halide emulsion layer.Type: ApplicationFiled: July 3, 2001Publication date: April 4, 2002Inventors: Hisashi Mikoshiba, Hiroshi Fukuzawa, Naoto Matsuda
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Publication number: 20020037486Abstract: A photographic material comprising a support and at least one layer which comprises at least one spectrally sensitized silver halide emulsion, characterised in that the material contains at least one compound of formula 1Type: ApplicationFiled: July 26, 2001Publication date: March 28, 2002Inventors: Peter Bergthaller, Jorg Siegel, Hans-Ulrich Borst
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Patent number: 6350569Abstract: A heat-developable photographic material which contains a particular class of polyhalogenated organic compound having a water-soluble group in one or more layers on the side of the image-forming layer. The heat-developable photographic material can be obtained at a low cost and has much reduced fog and excellent storage stability.Type: GrantFiled: March 30, 2000Date of Patent: February 26, 2002Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsuyuki Watanabe, Hiroyuki Suzuki, Masaru Takasaki, Shigeo Hirano
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Patent number: 6350567Abstract: A silver halide photographic element comprising a silver halide emulsion which is greater than 50 mole-% silver chloride, said emulsion containing an isothiazolone compound represented by the formula wherein R1 is a substituent; and Z contains the carbon atoms necessary to form a substituted or unsubstituted non-aromatic ring, wherein the isothiazolone compound was added before or during precipitation of the emulsion.Type: GrantFiled: October 7, 1999Date of Patent: February 26, 2002Assignee: Eastman Kodak CompanyInventors: Benjamin T. Chen, Roger L. Klaus, Jeri L. Mount
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Patent number: 6350564Abstract: Disclosed is a color silver halide photographic element comprising a support bearing: (1) a light sensitive silver halide emulsion layer; (2) a nitrogen heterocycle with a minimum of three heteroatoms that does not react with oxidized developer, does not contain free thiol substituents, and has a ClogP sufficient to increase the photographic speed of said element compared to the same element without the compound, said heterocycle compound located either in said light sensitive layer or in a layer adjacent to it; and (3) a light reflecting silver halide material; provided that the heterocycle compound and the light reflecting material are located either (a) in different layers of the element located close enough to each other so that a super-additive speed increase is realized or (b) in the same light sensitive layer. The invention provides improved light sensitivity.Type: GrantFiled: October 17, 2000Date of Patent: February 26, 2002Assignee: Eastman Kodak CompanyInventors: Joseph F. Bringley, James A. Friday, Stephen P. Singer, Marcello Vitale
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Publication number: 20020015926Abstract: Image recording materials, especially photothermographic light-sensitive image recording materials, that comprise a compound of formula (1) to acquire excellent image storage stability: 1Type: ApplicationFiled: June 11, 1999Publication date: February 7, 2002Inventors: TOSHIKI FUJIWARA, RIKIO INOUE
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Patent number: 6344313Abstract: An object of the present invention is to provide a heat-developable photosensitive material of improved fluctuation of photographic performance (sensitivity, Dmin) arisen from fluctuation of development temperature condition (temperature, time) and storage time after heat development.Type: GrantFiled: March 30, 2000Date of Patent: February 5, 2002Assignee: Fuji Photo Film Co., Ltd.Inventors: Takahiro Goto, Toshihide Ezoe, Hiroyuki Suzuki, Minoru Sakai, Hideki Maeta, Nobuaki Inoue, Masaru Takasaki
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Patent number: 6333146Abstract: Disclosed is a compound represented by the following formula (I): wherein Z1 represents an atomic group necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring; Z2 represents an atomic group necessary to form a 5- or 6-membered heterocyclic ring, Z2 may further be substituted, or may be condensed with a hetero ring or a benzene ring; R1 represents a hydrogen atom, a halogen atom, a mercapto group, an alkyl group, an alkenyl group, an aryl group, an alkylthio group, an alkenylthio group, or an arylthio group; L1 and L2 each represents a methine group; p1 represents 0 or 1; V1 represents a substituent; and n represents 0, 1 or 2, and when n represents 2, a plurality of V1 may be the same or different.Type: GrantFiled: March 10, 2000Date of Patent: December 25, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsumi Kobayashi, Takashi Katoh, Junji Nishigaki
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Patent number: 6331386Abstract: A photothermographic element has a non-photosensitive organic silver salt, a photosensitive silver halide, and a binder on a support. A polymer latex constitutes at least 50% by weight of the binder in an image forming layer containing the photosensitive silver halide. The image forming layer has been formed by applying a coating solution in which at least 60% by weight of a solvent is water. The image forming layer contains a specific compound as a nucleating agent and has been formed by applying a coating solution having added thereto a water dispersion of the compound. The element exhibits a high contrast, long-term storage stability, and no increase of Dmin upon printing to PS plates.Type: GrantFiled: April 28, 1999Date of Patent: December 18, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshihide Ezoe, Kohzaburoh Yamada
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Publication number: 20010051319Abstract: A photothermographic material comprising at least (a) a photosensitive silver halide, (b) a reducible silver salt, (c) a reducing agent represented by the following formula (1), (d) a binder, and (e) a phenol compound represented by the following formula (2) on the same side of a support: 1Type: ApplicationFiled: March 16, 2001Publication date: December 13, 2001Inventors: Toyohisa Oya, Kazunobu Katoh
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Patent number: 6329127Abstract: An object of the present invention is to provide a heat-developable photosensitive material of less heat development temperature and humidity dependency, which is unlikely to be affected by uneven temperature distribution in heat development apparatuses and humidity condition, and can stably form uniform images, in particular, a heat-developable photosensitive material of improved stability of coating solutions overtime, which can form uniform ultrahigh contrast images without unevenness, which are suitable for mechanical processes, and exhibit suppressed fluctuation of photographic performance depending on the storage condition.Type: GrantFiled: March 30, 2000Date of Patent: December 11, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Ito, Katsuyuki Watanabe, Kazunobu Katoh, Minoru Sakai
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Patent number: 6329135Abstract: A silver halide photothermographic material is disclosed, comprising a support having thereon a light-sensitive layer and light-insensitive layer, wherein the light-sensitive layer or the light-insensitive layer comprises a heteroatom-containing macrocyclic compound, and the light-sensitive layer comprising a sensitizing dye exhibiting maximum sensitivity at a wavelength of 600 nm or more.Type: GrantFiled: June 2, 2000Date of Patent: December 11, 2001Assignee: Konica CorporationInventor: Hiroshi Kashiwagi
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Publication number: 20010041314Abstract: A method for reducing dye stain of an exposed photographic element, said element comprising a support having thereon at least one image-forming layer containing a photobleachable dye, the method comprising processing the element, and exposing the processed element, in presence of a N-oxyazinium, to radiation that can be absorbed either by the photobleachable dye or by the N-oxyazinium.Type: ApplicationFiled: December 4, 2000Publication date: November 15, 2001Inventors: Samir Y. Farid, Ramanuj Goswami, Mary E. Craver, John M. Mangus
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Patent number: 6316177Abstract: Disclosed is a color silver halide photographic element comprising a light-sensitive silver halide emulsion layer or a non-silver containing light-insensitive layer, said light-sensitive or light-insensitive layer containing a polymer compound comprising a heterocycle unit derived from: (a) a heterocycle monomer (1) comprising two or more annulated rings containing, in total, a minimum of three ring heteroatoms of which no more than two of the heteroatoms are connected in sequence to each other and (2) having a ClogP less than 6.2; or (b) a monocyclic heterocycle monomer having exactly three ring heteroatoms and having a ClogP less than 8.75; with the proviso that the heterocycle unit does not contain a hydroxy or mercapto group (or their tautomeric equivalent), and does not react with oxidized developer; and the amount of the polymer compound in the element being sufficient to increase the photographic speed of the element compared to the same element without the compound.Type: GrantFiled: March 31, 2000Date of Patent: November 13, 2001Assignee: Eastman Kodak CompanyInventors: Philip A. Allway, Tienteh Chen, David S. Ross, Stephen P. Singer
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Patent number: 6309814Abstract: A heat developable photosensitive material having on a support a non-photosensitive sliver salt, a photosensitive sliver halide, and a binder, which has an image forming layer containing the photosensitive sliver halide and comprises cyclic ketone or cyclic imine compound having a specific structure in combination with a nucleation agent on the side that the image forming layer is formed. This heat developable photosensitive material is an excellent high contrast sensitive material having a good stability.Type: GrantFiled: February 1, 2000Date of Patent: October 30, 2001Assignee: Fuji Photo Film Co., Ltd.Inventor: Tadashi Ito
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Patent number: 6309811Abstract: Disclosed is a color photographic element comprising: a) a first light sensitive silver halide emulsion layer containing a compound with an aromatic bicyclic nitrogen nucleus of which at least one ring is six-membered and with two nitrogen ring atoms in each ring and with at least one N—H bond provided that the ClogP for the compound is at least 2.0 and less than 7.2; and (b) a second light sensitive silver halide emulsion layer, having a spectral sensitivity different from that of the first light sensitive silver halide emulsion layer, containing a compound of Formula III: COUP-(TIME)j-INH III wherein: COUP is a coupler parent group capable of forming a dye upon reaction with an oxidized developer; TIME is a timing group and j is 0,1 or 2; and INH is a mild silver development inhibitor fragment. The invention provides improved color reproduction.Type: GrantFiled: July 21, 1999Date of Patent: October 30, 2001Assignee: Eastman Kodak CompanyInventors: Philip A. Allway, Louis E. Friedrich, Stephen P. Singer
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Publication number: 20010031430Abstract: A photothermographic material is disclose, comprising a light-sensitive silver halide, an organic silver salt, a reducing agent, a thiuronium salt and a binder, wherein the photothermographic material further contains at least one of compounds represented by formulas such as 1Type: ApplicationFiled: January 17, 2001Publication date: October 18, 2001Inventors: Shinji Kudo, Keiko Chigusa, Hiroshi Kashiwagi
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Publication number: 20010029000Abstract: A photothermographic material comprising a defined amount of a compound represented by the following general formula as a reducing agent is disclosed. In the following general formula, R1 and R1′ each independently represent an alkyl group, at least one of which is a secondary or tertiary alkyl group; R2 and R2′ each independently represent hydrogen atom or a group that can be a substituent on benzene ring; L represents —S— group or a —CH(R3)— group where R3 represents hydrogen atom or an alkyl group; and X and X′ each independently represent hydrogen atom or a group that can be a substituent on benzene ring. The photothermographic material is characterized by providing sufficient image density by heat development, and showing good silver color tone and little change with time after the development.Type: ApplicationFiled: January 5, 2001Publication date: October 11, 2001Inventors: Yasuhiro Yoshioka, Kouta Fukui, Makoto Suzuki
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Patent number: 6297001Abstract: A photothermographic material is disclosed, comprising a non-photosensitive organic silver salt, a photosensitive silver halide, a reducing agent a binder and a cross-linking agent; the photothermographic material further comprising a compound capable of generating a labile species other than a halogen atom upon exposure to ultraviolet radiation or visible radiation to deactivate the reducing agent.Type: GrantFiled: February 28, 2000Date of Patent: October 2, 2001Assignee: Konica CorporationInventors: Hideki Takiguchi, Katsura Hirai
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Publication number: 20010024772Abstract: A photothermographic material is disclosed, comprising on a support an organic silver salt, a light-sensitive silver halide, a reducing agent, and a compound represented by the following formula, 6-aryl-2,4-bis(tribromomethyl)-s-triazine or a 6-heteroaryl-2,4-bis(tribromomethyl)-s-triazine.Type: ApplicationFiled: February 13, 2001Publication date: September 27, 2001Inventors: Katsura Hirai, Kiyoshi Fukusaka
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Publication number: 20010021493Abstract: A photothermographic material comprising, on one surface of a support, at least one kind of photosensitive silver halide, a silver salt of an organic acid, a reducing agent for silver ions, and a binder, wherein (1) said material further comprises two or more kinds of organic polyhalogenated compounds, and (2) a melting point of a mixture which consists of the organic polyhalogenated compounds in the same content ratio as the content ratio of said compounds in the photothermographic material is in the range of from −10° C. to 50° C. relative to a heat development temperature for the photothermographic material. The photothermographic material of the present invention shows high sensitivity and superior storability before heat development, and the material can be used for medical images, photoengraving and the like.Type: ApplicationFiled: January 11, 2001Publication date: September 13, 2001Inventor: Kouta Fukui
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Patent number: 6277554Abstract: In a thermographic recording element comprising an organic silver salt, a photosensitive silver halide, and a reducing agent, there are further included a specific compound and a hydrazine derivative. The element exhibits a high contrast and the minimized dependency of photographic properties on developing temperature.Type: GrantFiled: May 11, 1999Date of Patent: August 21, 2001Assignee: Fuji Photo Film, Co., Ltd.Inventors: Kohzaburoh Yamada, Hiroyuki Suzuki, Toshihide Ezoe
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Patent number: 6277553Abstract: A thermographic recording element having at least one image forming layer contains an organic silver salt, a reducing agent, and a nucleating agent. The element has high Dmax, high sensitivity, satisfactory contrast and minimized black pepper.Type: GrantFiled: October 16, 1998Date of Patent: August 21, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Masahiko Taniguchi, Kohzaburoh Yamada, Toshihide Ezoe
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Publication number: 20010010895Abstract: Disclosed is a color photographic element comprising:Type: ApplicationFiled: July 21, 1999Publication date: August 2, 2001Inventors: PHILIP A. ALLWAY, LOUIS E. FRIEDRICH, STEPHEN P. SINGER
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Patent number: 6265146Abstract: A thermally developable photosensitive material of enhanced sensitivity, reduced variation in sensitivity following pre-exposure storage and improved silver image tone is disclosed, comprising a support having thereon an organic silver salt, a binder, a photosensitive silver halide, an infrared-sensitizing dye and a heteroatom containing macrocyclic compound.Type: GrantFiled: February 25, 2000Date of Patent: July 24, 2001Assignee: Konica CorporationInventor: Hiroshi Kashiwagi
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Patent number: 6261754Abstract: A heat developable image recording material is disclosed in which having at least one image forming layer formed on a support, and a multilayered protection layer consisting of a lower protection layer formed adjacent to and on the image forming layer and at least one upper protection layer formed on the lower protection layer, wherein the lower protection layer comprises a polymer as a binder, in which I/O value of the polymer that is obtained by dividing inorganic value by organic value based on an organic conception diagram is equal to or less than 0.60, and wherein a ratio of the I/O value of the polymer contained as the binder of the lower protection layer to the I/O value of a polymer contained as a binder of the upper protection layer is less than 1.0.Type: GrantFiled: January 13, 2000Date of Patent: July 17, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Kunio Ishigaki, Takahiro Ishizuka
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Patent number: 6248512Abstract: An image forming method for a thermally processable photosensitive material is disclosed, comprising exposing a thermally processable photosensitive material to light using a laser light source, and subjecting the exposed photosensitive material to thermal processing, wherein the thermally processable photosensitive material comprises a support having thereon an organic silver salt, a binder, a photosensitive silver halide, and a compound containing nitrogen covalently bonded to halogen represented by the following formula or a nitrogen-containing acyclic compound associated with a pair of halogen atoms represented by the following formulaType: GrantFiled: April 8, 1999Date of Patent: June 19, 2001Assignee: Konica CorporationInventors: Norio Miura, Keiko Ishidai
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Publication number: 20010003037Abstract: Disclosed is a silver halide emulsion comprising gold-sensitized silver halide grains having a silver chloride content of 95 mole % or more, wherein from 8% to 50% of the amount of gold existing on the part of the silver halide grains is in the state of metal gold.Type: ApplicationFiled: November 30, 2000Publication date: June 7, 2001Inventor: Seiji Yamashita
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Patent number: 6214533Abstract: A thermally developable photosensitive material is disclosed. The thermally developable photosensitive material comprises at least one of dye represented by Formula I-a through I-d and at least one of compound represented by Formula 2. The chemical formula is described in the specification.Type: GrantFiled: April 5, 1999Date of Patent: April 10, 2001Assignee: Konica CorporationInventors: Socman Hó, Nobuaki Kagawa
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Patent number: 6214529Abstract: This invention relates to a method of reducing fog in a silver halide emulsion comprising taking a high fogging emulsion which has been chemically sensitized and cooled, holding the high fogging emulsion in the form of a melt in preparation for coating on a support, and prior to or during said holding, contacting the emulsion with an isothiazolin-one compound represented by the following formula wherein R1 is a substituent; and Z contains the carbon atoms necessary to form a substituted or unsubstituted non-aromatic ring. It also relates to silver halide photographic elements containing such emulsions.Type: GrantFiled: October 12, 1999Date of Patent: April 10, 2001Assignee: Eastman Kodak CompanyInventors: Jon N. Eikenberry, Kenneth G. Harbison
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Patent number: 6190848Abstract: The invention provides a color photographic element comprising: a) a first light sensitive silver halide emulsion layer containing a compound of Formula I: wherein Q represents the atoms necessary to form a triazole ring and the associated bonds, provided that the ring members may be substituted and that two of such members may join to form a fused ring; provided further that the ClogP for the compound of Formula I is from 4.75 to 9.0; and b) a second light sensitive silver halide emulsion layer, having a spectral sensitivity different from that of the first light sensitive silver halide emulsion layer, containing a compound of Formula II: COUP-(TIME)j-INH II wherein: 1) COUP is a coupler parent group capable of forming a dye upon reaction with an oxidized developer; 2) TIME is a timing group and j is 0 or 1; and 3) INH is a mild silver development inhibitor fragment. The invention provides improved color reproduction.Type: GrantFiled: July 21, 1999Date of Patent: February 20, 2001Assignee: Eastman Kodak CompanyInventors: Jane S. Boff, Bernard A. Clark, Louis E. Friedrich, Stephen P. Singer
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Patent number: 6190849Abstract: The invention provides a color photographic element comprising: a) a first light sensitive silver halide emulsion layer containing a tetrazole compound of Formula I: wherein when R1 is hydrogen, then R2 is an alkyl, aryl, alkoxy , aryloxy, alkylthio or arylthio, sulfoxyl, sulfonyl, sulfamoyl, —O—CO—, —O—SO2—, a heterocyclic group, a carbonyl group or an amino group or when R2 is a thiol (—SH) group, then R1 is an alkyl, aryl or heterocyclic group provided further that the ClogP for the compound of Formula I is at least 2.0 and less than 7.Type: GrantFiled: July 21, 1999Date of Patent: February 20, 2001Assignee: Eastman Kodak CompanyInventors: Paul A. Burns, Louis E. Friedrich, Stephen P. Singer
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Patent number: 6153370Abstract: There is disclosed a light-sensitive silver halide photographic emulsion, which comprises light-sensitive silver halide grains mainly composed of (100) planes and (111) planes, at least one compound that is adsorbed selectively on the (100) planes of the silver halide grains, and at least one spectrally sensitizing dye. There is also disclosed a light-sensitive material using the emulsion. The emulsion is high in sensitivity and excellent in graininess.Type: GrantFiled: April 24, 1997Date of Patent: November 28, 2000Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoichi Maruyama, Kimiyasu Morimura, Nobuyuki Haraguchi, Hiroyuki Mifune, Tetsuro Kojima
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Patent number: 6140029Abstract: The invention provides a silver halide photographic element comprising a non-light sensitive layer containing elemental silver and a nitrogen heterocycle compound having a ClogP of at least 4.5, which compound comprises a ring system of one or more fused rings containing at least one --N--H bond, the ring system comprising a total of at least three nitrogen ring members and the associated bonds; provided that the compound does not contain an --SH group or >C.dbd.S group and does not react with an oxidized developer.Type: GrantFiled: September 30, 1999Date of Patent: October 31, 2000Assignee: Eastman Kodak CompanyInventors: Bernard A. Clark, Jane S. Boff, Philip A. Allway, Louis E. Friedrich, Stephen P. Singer
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Patent number: 6127108Abstract: A silver halide color photographic material wherein a cyan dye image density reduction is prevented in time of bleach fixing processing or bleach fixing, and its processing method by incorporating an oil soluble organic basic compound in the silver halide color photographic material. The compound oil soluble organic basic compound is represented by Formulas (I) to (V) defined in the specification.Type: GrantFiled: July 24, 1997Date of Patent: October 3, 2000Assignee: Konica CorporationInventors: Hiroshi Kita, Kazuhiro Murai
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Patent number: 6124086Abstract: The invention relates to a photographic element wherein at least one layer comprises silver halide grains wherein said grains have a surface iodide of less than 0.6 mol percent, total grain iodide of about 1.0 to 10 mol percent, said iodide being introduced in the core of the grains, an alkynylamine compound of Formula I: ##STR1## wherein X represents oxygen, sulfur, selenium, or an unsubstituted or alkyl substituted nitrogen; R.sup.1 represents hydrogen or an alkyl of from 1 to 5 carbon atoms, and R.sup.2 represents hydrogen, or an alkyl, aryl, heteroaryl, carbocyclic or heterocyclic group, and R.sup.3 and R.sup.4 independently represent hydrogen, halogen, or a substituted or unsubstituted alkyl or alkoxy group, preferably one having fewer than 6 carbon atoms, and the reductone of Formula II ##STR2## 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, R.sub.1 and R.Type: GrantFiled: January 19, 1999Date of Patent: September 26, 2000Assignee: Eastman Kodak CompanyInventors: Jon N. Eikenberry, Chris J. Johnson
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Patent number: 6120983Abstract: A photothermographic material contains an organic silver salt, a photosensitive silver halide, a reducing agent, a binder, and a compound of the formula: X--L.sub.1 --D wherein D is an electron donative group of atoms, X is an adsorption promoting group to silver halide, and L.sub.1 is a valence bond or a linking group. It has high sensitivity in the red to infrared region and experiences a minimal change of photographic properties under different developing conditions.Type: GrantFiled: October 22, 1997Date of Patent: September 19, 2000Assignee: Fuji Photo Film Co., LtdInventors: Hisashi Okada, Ryo Suzuki, Naoki Asanuma, Tadashi Ikeda, Shigeo Hirano
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Patent number: 6063559Abstract: A (photo)thermographic recording material according to the present invention comprising a thermosensitive element contains a substantially light-insensitive organic silver salt, a reducing agent therefor in thermal working relationship therewith and a binder (and optionally further including photosensitive silver halide), wherein the (photo)thermographic recording material is exclusive of polypyrrole/poly(styrene sulfonic acid) in an electrically-conductive layer and further contains a compound represented by formula (I) or a reaction product thereof with a polymer having active hydrogen atoms: ##STR1## where R.sup.1 and R.sup.3 independently represent hydrogen, a hydroxyalkyl group, an alkoxyalkyl group, an alkyl group, a --(C.dbd.O)R.sup.5 group or an alkenyl group; and R.sup.2 and R.sup.4 independently represent a hydroxyalkyl group, an alkoxyalkyl group, an alkyl group, a --(C.dbd.O)R.sup.5 group or an alkenyl group; or R.sup.1 and R.sup.2 together and R.sup.3 and R.sup.Type: GrantFiled: August 17, 1998Date of Patent: May 16, 2000Assignee: Agfa-GevaertInventors: Carlo Uyttendaele, Ivan Hoogmartens
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Patent number: 6063558Abstract: A photosensitive element which comprises on a support at least one photosensitive silver halide emulsion layer and at least a non-light sensitive layer, wherein the silver halide emulsion layer comprises a chalcogenic compound satisfying formula (1): ##STR1## wherein: X represents Se or Te, forming a double bond with its neighbouring C-atom,Nu represents a nucleophilic group which brings an electron pair in heterolytic bond formation; Nu has a pK.sub.a -value of at least 2.0 if Nu is an acidic group,L represents a divalent linking group representing each group which can position an electron donating atom in any of the 5th to the 8th position vis-a-vis the carbon atom of the carbon-chalcogen double bond,AQB represents the necessary atoms to form a heterocyclic 5- or 6-membered ring, provided that when A is a Nitrogen-atom, B is an atom selected from the group consisting of NR.sup.1, O, S, Se and Te,R.sup.Type: GrantFiled: May 25, 1999Date of Patent: May 16, 2000Assignee: Agfa-Gevaert, N.V.Inventors: Johan Loccufier, Rene De Keyzer, Antonius Rutges
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Patent number: 6057090Abstract: A silver halide photographic material is described, which contains the compound represented by the following formula (I): ##STR1## wherein R.sup.1 represents a substituted or unsubstituted alkylene group having from 1 to 5 carbon atoms; X represents a water-soluble group; and R.sup.2 represents a substituted or unsubstituted alkyl group having the sum total of from 14 to 40 carbon atoms, an alkenyl group, an aryl group, an alkoxyl group, --NR.sup.3 R.sup.4 (R.sup.3 and R.sup.4 each independently represents an alkyl group having from 1 to 40 carbon atoms, a hydrogen atom, or an aryl group), a bicycloalkyl group, a bicycloalkenyl group, a cycloalkyl group, a cycloalkenyl group or a heterocyclic group, provided that when X represents a quaternary ammonium salt structure, R.sup.2 does not represent an alkyl group having from 14 to 17 carbon atoms.Type: GrantFiled: September 18, 1996Date of Patent: May 2, 2000Assignee: Fuji Photo Film Co., Ltd.Inventors: Hisashi Mikoshiba, Mamoru Sakurazawa, Masakazu Morigaki
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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: 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: 5968724Abstract: This invention relates to silver halide photographic element comprising a silver halide emulsion chemically sensitized in the presence of an isothiazolin-one compound represented by the formula ##STR1## wherein R.sup.1 is a substituent; and Z is a substituted or unsubstituted saturated ring, wherein the isothiazolin-one compound was added after precipitation of the emulsion.Type: GrantFiled: October 22, 1998Date of Patent: October 19, 1999Assignee: Eastman Kodak CompanyInventors: Jon N. Eikenberry, Roger L. Klaus, Roger L. Lok, Jerzy Z. Mydlarz, Brian S. White
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Patent number: 5962210Abstract: The invention relates to a photographic emulsion comprising silver iodochloride grains, said grains further comprising iridium, said grains chemically sensitized with gold in an amount of between 120 and 200 mg gold per silver mole and sulfur in an amount between 0.1 and 20 mg sulfur per silver mole, 1-(3-acetamidophenyl)-5-mercaptotetrazole, 1-phenyl-5-mercaptotetrazole, and a disulfide compound represented by the following formula: ##STR1## wherein X is independently --O--, --NH-- or --NR--, where R is a substituent;m and r are independently 0, 1 or 2;X is --H or a cationic species;Ar is an aromatic group; andL is a linking group, where p is 0 or 1.Type: GrantFiled: January 12, 1998Date of Patent: October 5, 1999Assignee: Eastman Kodak CompanyInventors: Paul T. Hahm, Alberto M. Martinez, Melvin M. Kestner, Eric L. Bell, Walter H. Isaac
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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: 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: 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: 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