Polyhetero Atom Ring Patents (Class 430/614)
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Patent number: 4885233Abstract: Photographic recording material is described which employs a combination of a mercury compound and a benzothiazolium compound to reduce chemical fog without adverse loss of photographic speed.Type: GrantFiled: July 28, 1988Date of Patent: December 5, 1989Assignee: Eastman Kodak CompanyInventor: Calvin R. Messing
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Patent number: 4882261Abstract: Novel dot enhancing compositions are disclosed for use in high contrast negative-working image-forming systems. The compositions include compounds of the general formula: ##STR1## wherein R.sub.1 is an aromatic group, A is a substituted or unsubstituted aromatic nucleus, and the two carboxyl groups specifically depicted in general formula (I) are each bound to a different carbon atom of said aromatic nucleus.The dot enhancing compositions may be incorporated into a silver halide photographic emulsion or into another hydrophilic colloid layer of a photographic material, or into a developing solution or, alternatively, into both. The dot enhancers of the invention improve density and contrast of images formed, as well as providing a harder, smoother, better formed dot for use in letter press and offset lithography.Type: GrantFiled: June 27, 1988Date of Patent: November 21, 1989Assignees: Polychrome Corp., Dainippon Ink & Chemicals, Inc.Inventors: Yasuhiko Kojima, John Pilot, Burton H. Waxman
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Patent number: 4873172Abstract: A process for forming a superhigh contrast negative image with a stable developer is disclosed, which comprises development processing a silver halide photographic material in the presence of a compound of formula (I) and a compound of formula (II) as defined in the specification.Type: GrantFiled: August 8, 1988Date of Patent: October 10, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Shoji Ishiguro, Shigeo Hirano, Tadao Shishido, Akio Miyake
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Patent number: 4871658Abstract: A silver halide photographic material is disclosed which comprises a support coated with photographic layers including one or more silver halide emulsion layers, at least one of said silver halide emulsion layers containing silver halide grains with a silver iodide content of 3.0-15 mol %, and at least one of said photographic layers containing a compound represented by the following general formula (I): ##STR1## where Y is an aromatic group or a 5- or 6-membered heterocyclic group.Type: GrantFiled: December 2, 1988Date of Patent: October 3, 1989Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Eiichi Sakamoto, Yutaka Kaneko, Hidetaka Ninomiya, Takashi Kamio, Atsuo Ezaki, Hideo Akamatsu, Hideaki Haraga
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Patent number: 4865965Abstract: This invention is directed to a light sensitive silver halide emulsion comprising a cyclic ether compound having an acid function and to an element containing such emulsion and to a process for using same. The compound comprises, in the cyclic ring, at least two atoms from the group consisting of sulfur and selenium, each of which atoms being separated from one another by a chain of at least two carbon atoms. Such compound acts as a solvent and as a growth modifying agent for silver halide grains. Also described is a process for modifying the growth of silver halide grains.Type: GrantFiled: May 12, 1988Date of Patent: September 12, 1989Assignee: Eastman Kodak CompanyInventors: Gerard Friour, Arthur H. Herz, Christian Paris, Marcel Riveccie
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Patent number: 4861703Abstract: Radiation-sensitive silver halide photographic elements are disclosed which are protected against fog by cyclic dichalcogenides. A new cyclic oxaspiro ditelluride is disclosed.Type: GrantFiled: August 15, 1988Date of Patent: August 29, 1989Assignee: Eastman Kodak CompanyInventors: Roger Lok, Wolfgang H. H. Gunther, John P. Freeman
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Patent number: 4859580Abstract: A heat-developable photosensitive material having, on a support, a layer comprising a binder, a light-sensitive silver halide, a reducing agent, and at least one compound selected from cyclic imino compounds or mercapto compounds, which can produce images of high quality by heat development when said light-sensitive silver halide is selected from the group consisting of silver chloride, silver bromide, silver chlorobromide, mixed crystals of silver iodide and silver chloroiodide, mixed crystals of silver iodide and silver iodobromide, and mixed crystals of silver iodide and silver chloroiodobromide.Type: GrantFiled: March 29, 1988Date of Patent: August 22, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiaki Aono, Hiroshi Hara
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Method of processing silver halide color photographic material using a reduced amount of replenisher
Patent number: 4849324Abstract: In a process for the continuous treatment of silver halide color photographic light-sensitive materials with supplying a replenisher to a developing bath, the amount of the replenisher is 900 m or less per m.sup.2 of the light-sensitive materials, and the light-sensitive materials contain a certain type of mercapto heterocyclic compounds. Constant results in finished development and lower fog are attained and fogging during storage of raw light-sensitive materials is suppressed even when the amount of the replenisher is very small.Type: GrantFiled: April 21, 1988Date of Patent: July 18, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Shunichi Aida, Morio Yagihara, Shinzo Kishimoto, Hiroshi Fujimoto -
Patent number: 4849327Abstract: Benzo-bis-thiazole quaternary salts having attached to at least one quaternary nitrogen atom thereof an alkenyl group carrying a double bond in the .beta.-position and their use as antifogging agents in silver halide light-sensitive materials.Type: GrantFiled: May 26, 1988Date of Patent: July 18, 1989Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ivano Delprato
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Patent number: 4837143Abstract: A silver halide photographic light-sensitive material comprising a support bearing at least one silver halide emulsion layer is disclosed. The silver halide emulsion layer contains silver halide grains comprising not less than 80 mol% of silver chloride and a water soluble iridium compound in an amount of from 10.sup.-8 to 10.sup.-5 mol per mol of a silver halide contained in the emulsion layer. And the emulsion layer is hardened with a hardner represented by General Formula [I] or [II]. ##STR1## The photographic material has an excellent antipressure property and suitable for a rapid processing.Type: GrantFiled: December 29, 1988Date of Patent: June 6, 1989Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Kazuo Komorita, Kaoru Onodera
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Patent number: 4837141Abstract: A thermally developable light-sensitive material is disclosed that the said material has at least one light-sensitive silver halide containing layer on a support and which further contains a compound represented by the general formula (I):X (J.sub.m F).sub.n (I)wherein X is the residue of the development restrainer; J is a divalent linkage; F is an immobilizing group that is capable of reducing the diffusibility of the compound of formula (I) or a silver salt or silver complex thereof during thermal development; m is 0 or 1; and n is an integer of 1 to 3.Type: GrantFiled: May 3, 1988Date of Patent: June 6, 1989Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Junichi Kohno, Ken Okauchi, Sohei Goto, Masaru Iwagaki, Tawara Komamura
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Patent number: 4801523Abstract: Process for preparing photographic emulsion comprising bringing aqueous silver and chloride-containing halide salt solutions into contact in the presence of a dispersing medium to form octahedral silver halide grains having a halide content of at least 50 mole percent chloride, based on total moles of silver present, the improvement forming the grains in the presence of a crystal modifying amount of an aminoazapyridine as described in pH range of 2.5 to 9, pCl range of 0 to 3, the aminoazapyridine compound being added after at least about 6% to about 45% of the silver salt solution has been added.The photographic emulsion is useful in x-ray, laser scanner films, as color separation elements and inverse transfer systems, etc.Type: GrantFiled: August 28, 1987Date of Patent: January 31, 1989Assignee: E. I. Du Pont de Nemours and CompanyInventor: Thomas P. Tufano
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Patent number: 4780400Abstract: Silver halide light-sensitive emulsions are protected against latent image fading by an effective amount of a 2-unsubstituted N-alkenyl-thiazolium salt compound.Type: GrantFiled: April 20, 1987Date of Patent: October 25, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventors: Walter Beltramini, Francesco Squarcia
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Patent number: 4772544Abstract: A heat-developable photographic material is disclosed wherein the photographic material comprising at least one of an acid or a salt thereof having an acid dissociation constant pKa of 7 or less.Type: GrantFiled: August 7, 1985Date of Patent: September 20, 1988Assignee: Fuji Photo Film Co., Ltd.Inventor: Hiroyuki Hirai
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Patent number: 4769316Abstract: A restraining method for restraining the formation of a re-reversal negative image is described, comprising incorporating a cyanine dye or a merocyanine dye which is electron donative and is adsorbable on silver halide in at least one hydrophilic colloid layer of an internal latent image type direct positive silver halide photographic material as a re-reversal restrainer.Type: GrantFiled: June 18, 1986Date of Patent: September 6, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Tsutomu Miyasaki, Shigeo Hirano, Kiyoshi Morimoto
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Patent number: 4756999Abstract: A photothermographic element comprising a substrate having coated thereon a photothermographic medium comprising a binder having dispersed therein an organic silver salt or complex, a photocatalyst and a reducing agent, characterized in that the photothermographic medium contains as an antifoggant, in the absence of mercury compounds, an effective antifogging amount of a compound of the general formula: ##STR1## characterized in that: X.sup.1 and X.sup.2 independently represent halogen atoms,X.sup.3 represents a halogen atom or an electron withdrawing substituent, andZ represents the necessary atoms to complete a ring system which may comprise a single ring or a fused ring system which rings may bear substituents.Type: GrantFiled: November 3, 1986Date of Patent: July 12, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventors: Steven Swain, Ronald E. Watts
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Patent number: 4734358Abstract: A silver halide photographic light-sensitive material which is excellent in raw-stock preservability, physical characteristics of its layers such as glossiness, scratch resistance, and degree of swelling and whose sensitivity changes very little with time after manufacture comprising a compound represented by Formula [I] of the specification, hardened with at least one of the compounds represented by Formula [II] or [III] of the specification. The storage stability is further improved when at least one of the cyan couplers represented by Formula [IX] or [X] of the specification is present.Type: GrantFiled: November 25, 1986Date of Patent: March 29, 1988Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shun Takada, Masanobu Miyoshi, Kaoru Onodera
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Patent number: 4719174Abstract: A direct positive silver halide photographic light-sensitive material is described containing a weak electron donative, adsorptive compound represented by formula (I) or (II) effective for depressing formation of a re-reversed negative image, which is not a spectral sensitizing agent for silver halide or a nucleating agent:D--L--X (I)D--X (II)whereinD represents electron donative atoms comprising an aromatic ring or hereto ring, which is unsubstituted or substituted;L represents a linking group containing at least one of C, N, S and O and an atom or atoms necessary for cutting a .pi.-conjunction system; andX represents a group which is adsorptive with respect to silver halide and contains at least one of C, N, S, O and Se.Type: GrantFiled: April 2, 1986Date of Patent: January 12, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeo Hirano, Tsutomu Miyasaka, Shinsaku Fujita
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Patent number: 4699873Abstract: A negative silver halide photographic light-sensitive material comprising a support having provided thereon at least one silver halide emulsion layer is disclosed. At least one of the silver halide emulsion layers or another hydrophilic colloidal layer of the material contains a hydrazine derivative and a compound represented by the formula:R.sub.1 --S--S--R.sub.2wherein R.sub.1 and R.sub.2, which may be the same or different, each represents an aliphatic group, an aromatic group or a heterocyclic group, or when R.sub.1 and R.sub.2 are both aliphatic groups they may together form a ring. The material can rapidly form a superhigh contrast image using a stable processing solution.Type: GrantFiled: January 29, 1986Date of Patent: October 13, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiro Takahashi, Shigeo Hirano
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Patent number: 4680257Abstract: A silver halide photographic light-sensitive material is disclosed. The material is composed of a support base having a silver halide emulsion layer thereon which contains a hardener having an active vinyl group. The material also includes a compound represented by the general formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 independently represent a hydroxy group, a hydroxylamino group, an amino group, an alkylamino group, a substituted alkylamino group, an arylamino group, an alkoxy group, a phenoxy group, an alkyl group, an aryl group or a halogen atom. The photographic material gives improved results with respect to preventing latensification.Type: GrantFiled: September 13, 1985Date of Patent: July 14, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideaki Sato, Morio Yagihara
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Patent number: 4678741Abstract: A silver halide photographic material having on a support at least one hydrophilic colloid layer and at least one silver halide emulsion layer containing tabular silver halide grains having a grain diameter of at least 5 times the thickness of the grains and at least one compound represented by general formula (I) ##STR1## wherein R.sup.1 represents a methyl group and R.sup.2 represents an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group.Type: GrantFiled: April 14, 1986Date of Patent: July 7, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Sumito Yamada, Masaki Okazaki
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Patent number: 4675276Abstract: A silver halide photographic material containing a mesoionic 1,2,4-triazolium-3-thiolate compound in at least one hydrophilic colloidal layer of the silver halide photographic material gives photographic images having stable and excellent quality without being accompanied by the increased formation of fog and increased changes of sensitivity and gradation upon high temperature processing.Type: GrantFiled: September 12, 1986Date of Patent: June 23, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Koki Nakamura, Tetsuro Kojima, Takashi Toyoda, Hideo Ikeda
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Patent number: 4661438Abstract: Radiation sensitive silver halide photographic elements are disclosed which are protected from fog by quaternized aromatic oxatellurazinium salts. The aromatic oxatellurazinium salts can be initially incorporated in the photographic element as manufactured or during processing.Type: GrantFiled: January 31, 1986Date of Patent: April 28, 1987Assignee: Eastman Kodak CompanyInventors: Rosemary Przyklek-Elling, Wolfgang H. H. Gunther, Roger Lok
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Patent number: 4659647Abstract: A photosensitive silver halide material for obtaining black and white half-tone dot or line images comprises a fine grain and high-chloride silver halide emulsion reactively associated with an aqueous latex of a hydrophobic vinyl addition polymer in combination with a stabilizer selected from the group consisting of 4-hydroxy-1,3,3a,7-tetrazaindenes, benzotriazoles and benzimidazoles. The silver halide emulsion has an average grain size lower than or equal to 0.20 micron with at least 60% of its molar halide content consisting of chloride ions.The material allows high-contrast and high resolving power images to be obtained.The material has a good developability in photographic processings and this reduces the development times and increases productivity.Type: GrantFiled: December 10, 1985Date of Patent: April 21, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventors: Alberto Vacca, Angelo Vallarino
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Patent number: 4650749Abstract: A heat developable light-sensitive material containing a compound represented by formula (I) or (II) ##STR1## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, a heterocyclic group, a carboxyl group or a salt thereof, a halogen atom, a cyano group, an alkylsulfonyl or arylsulfonyl group, a sulfamoyl group, a carbamoyl group, an alkoxycarbonyl or aryloxycarbonyl group, a di- or mono-alkylphosphoryl or arylphosphoryl group, a di- or mono-alkylphosphinyl or arylphosphinyl group, an alkylsulfinyl or arylsulfinyl group, an acyl group, an amino group, an acylamino group, an acyloxy group or a group represented by X; X represents a decarboxylation accelerating group; or any two of R.sub.1, R.sub.2, and X may combine to form a ring; and the groups represented by R.sub.1, R.sub.Type: GrantFiled: August 26, 1985Date of Patent: March 17, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Kozo Sato, Yoshiharu Yabuki, Hiroyuki Hirai, Ken Kawata
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Patent number: 4640892Abstract: A heat-developable color photographic light-sensitive material comprises a support having thereon at least one layer containing the novel base precursor. This heat-developable color photographic light-sensitive material provides a high maximum density and low fog by heat-developing at a relatively low temperature and for a short period of time.Type: GrantFiled: August 26, 1985Date of Patent: February 3, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Ken Kawata, Yoshiharu Yabuki, Kozo Sato, Hiroyuki Hirai
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Patent number: 4639415Abstract: A silver halide color photographic material is disclosed which contains a magenta color image-forming coupler represented by the following formula (I) and a compound represented by the following formula (II): ##STR1## wherein Z represents the group of nonmetallic atoms necessary for forming a nitrogen-containing heterocyclic ring, provided that the ring to be formed by said Z may have a substitutent;X represents a hydrogen atom or a substituent capable of leaving upon reaction with the oxidized product of a color developing agent; andR represents a hydrogen atom or a substituent. ##STR2## wherein R.sub.1 is an aliphatic group, a cycloalkyl group or an aryl group; andY represents the group of nonmetallic atoms necessary for forming a 5- to 7-membered heterocyclic ring taken together with the nitrogen atom, provided that at least two hetero atoms among the heterocyclic ring-forming nonmetallic atoms including the nitrogen atom are not adjacent to each other.Type: GrantFiled: September 16, 1985Date of Patent: January 27, 1987Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Yutaka Kaneko, Toshihiko Kimura, Kenji Kadokura
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Patent number: 4634660Abstract: In the presence of a novel antifoggant represented by the general formula (I), a silver halide photographic material which has at least one light-sensitive silver halide emulsion layer on a support is development-processed. The developing solution is one containing both dihydroxybenzenes and 3-pyrazolidones, a developing solution containing both dihydroxybenzenes and aminophenoles, or a developing solution containing a primary aromatic amine developer to suppress markedly fog generation at much reduced sacrifice of sensitivity: ##STR1## wherein M represents a hydrogen atom, an alkali metal atom, NH.sub.4 or a mercapto group-protecting moiety which can be split-off in the presence of an alkali; n represents 1, 2 or 3; R.sup.1 represents a hydrogen atom or --COOR.sup.2 ; and R.sup.2 represents a hydrogen atom, an alkali metal atom, NH.sub.4, or an unsubstituted or substituted alkyl, aryl or aralkyl group.Type: GrantFiled: May 10, 1985Date of Patent: January 6, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Mifune, Koki Nakamura, Shoji Ishiguro
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Patent number: 4634661Abstract: A negative working photographic element is disclosed capable of producing a high contrast silver image. The photographic element is comprised of surface latent image forming monodispersed silver halide grains having a mean diameter of less than 0.7 .mu.m, a contrast enhancing arylhydrazide, and, in an amount sufficient to stabilize sensitivity, a carboxyalkyl substituted 3H-thiazoline-2-thione.Type: GrantFiled: July 18, 1985Date of Patent: January 6, 1987Assignee: Eastman Kodak CompanyInventor: Anthony Cavallaro
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Patent number: 4624913Abstract: A silver halide photographic light-sensitive material is described, comprising at least one light-sensitive silver halide emulsion layer on a support, wherein the emulsion in said light-sensitive silver halide emulsion layer comprises a silver iodobromide emulsion containing 3 mol % or more of iodide, and at least one of said light-sensitive emulsion layer or another hydrophilic colloid layer contains a polyoxyethylene type surface active agent and at least one of said light-sensitive emulsion layer or another hydrophilic colloid layer contains a meso-ionic triazolium compound represented by formula (I) ##STR1## wherein X represents a sulfur ion or --N--R.sup.4, and R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each represents a hydrogen atom or a substituted or nonsubstituted alkyl group, aryl group, or heterocyclic group, or R.sup.1 and R.sup.2, R.sup.2 and R.sup.3 or R.sup.3 and R.sup.4 can together form a heterocyclic ring.Type: GrantFiled: February 11, 1985Date of Patent: November 25, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuaki Miyasaka, Koki Nakamura, Shigeki Yokoyama
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Patent number: 4618563Abstract: A silver halide photographic light-sensitive material is described, comprising a support having thereon a light-sensitive silver halide emulsion layer having associated therewith a blocked photographic agent represented by formula (I) ##STR1## wherein A represents a photographically useful agent moiety, which may have a timing group; X.sup.1 and X.sup.2 each represents a carbonyl group, a sulfonyl group, or a sulfinyl group; Z represents an atomic group forming a 5-membered, 6-membered, or 7-membered ring; R.sup.1 and R.sup.2, which may be the same or different, each represents a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkoxy group, an acyl group, a sulfonyl group, or a heterocyclic group; R.sup.3 represents an alkyl group, an alkenyl group, a cycloalkyl group, a heterocyclic group, an aryl group, or an aralkyl group; m represents 0, 1, or 2; n represents 0 or 1; and the total of m+n is 1, 2, or 3.Type: GrantFiled: August 15, 1984Date of Patent: October 21, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Mitsunori Ono, Isamu Itoh, Keiji Mihayashi
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Patent number: 4615970Abstract: A silver halide photographic material containing at least one of compounds represented by formula (I) and salts thereof in at least one hydrophilic colloidal layer of the silver halide photographic material gives photographic images having stable and excellent quality without being accompanied by the increased formation of fog and increased changes of sensitivity and gradation upon high temperature processing: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic ring group; or one or both of said R.sub.1 and R.sub.2 and said R.sub.3 and R.sub.4 combine with each other to form a ring.Type: GrantFiled: December 6, 1984Date of Patent: October 7, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Tetsuro Kojima, Koki Nakamura, Takashi Toyoda
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Patent number: 4610958Abstract: A process of preparing a silver halide emulsion comprising mixing a water-soluble silver salt solution with a water-soluble halide solution in the presence of a protective colloid. Silver halide grains are formed which are octahedral or tetra decahedral silver iodobromide containing at least 4 mol % silver iodide. A tetrazaindene compound is added to the mixture before the completion of the addition of the silver salt solution.Type: GrantFiled: December 5, 1984Date of Patent: September 9, 1986Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shoji Matsuzaka, Shinya Shimura
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Patent number: 4596767Abstract: A silver halide photographic light-sensitive material spectrally sensitized in an infrared region is described. The silver halide photographic light-sensitive material has at least one silver halide photographic emulsion layer containing at least one infrared-sensitizing dye represented by the following general Formula (I): ##STR1## wherein R.sub.1, R.sub.2, R, D, Z, Z.sub.1, X, and n are as described in the specification; and at least one compound represented by the following general Formula (II): ##STR2## wherein Z.sub.2, R.sub.6, R.sub.7 and X.sub.1 are described in the specification.The silver halide photographic light-sensitive material has improved sensitivity in an infrared spectral region and improved preservability.Type: GrantFiled: April 13, 1984Date of Patent: June 24, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Yuji Mihara, Toshinao Ukai, Shoji Ishiguro
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Patent number: 4581330Abstract: Radiation sensitive silver halide photographic elements are disclosed which are protected from fog by aromatic oxatellurazinium salts. The aromatic oxatellurazinium salts can be initially incorporated in the photographic element as manufactured or during processing.Type: GrantFiled: February 19, 1985Date of Patent: April 8, 1986Assignee: Eastman Kodak CompanyInventors: Wolfgang H. H. Gunther, Roger Lok
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Patent number: 4578348Abstract: Radiation sensitive silver halide photographic elements are disclosed which are protected from fog by hydrolyzed quaternized chalcogenazolium salts of middle chalcogens, wherein the quaternizing substituent contains a ##STR1## group in which T and T.sup.1 are carbonyl or sulfonyl and m is from 1 to 3.Type: GrantFiled: March 18, 1985Date of Patent: March 25, 1986Assignee: Eastman Kodak CompanyInventors: John P. Freeman, Fred M. Macon, John D. Mee
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Patent number: 4576905Abstract: Compounds containing an aromatic ring portion fused with a tellurazolium or derivative tellurazole, tellurazoline (including tellurazolinylidene), or tellurazolinium ring portion are disclosed together with processes and intermediates for their preparation. With properly selected pendant groups these tellurazolium and derivative compounds can be usefully employed as dyes, antifoggants or stabilizers, nucleating agents, latent image keeping addenda, or speed or contrast altering addenda in silver halide photographic systems.Type: GrantFiled: October 12, 1984Date of Patent: March 18, 1986Assignee: Eastman Kodak CompanyInventors: Wolfgang H. H. Gunther, Ronald E. Leone, Rosemary Przyklek
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Patent number: 4558000Abstract: A color reversal light-sensitive material comprising a support having coated thereon at least a pair of silver halide emulsion layers having mutually different color sensitivities and consisting of an emulsion having a high silver/coupler ratio and an emulsion having a low silver/coupler ratio, the former ratio being greater by a factor of at least 5 than the latter ratio, and the latter emulsion being incorporated with a compound containing recurring units represented by the following General Formula (I): ##STR1## the substituents being defined within the specification. By including the compound of the general formula (I) within the particular emulsion layer which is highly susceptible to changes in sensitivity and maximum density, it is possible to prevent deterioration in color balance which has been found to be due to variation in the concentration of potassium bromide.Type: GrantFiled: March 16, 1984Date of Patent: December 10, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroyuki Yamagami, Yasuhiro Hayashi, Naoyasu Deguchi, Kiyoshi Imai
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Patent number: 4554243Abstract: A silver halide photographic light-sensitive material is described which comprises a support having thereon a light-sensitive silver halide emulsion layer, wherein the photographic light-sensitive material therein contains a blocked photographic agent capable of releasing a photographically useful agent and the blocked photographic agent has a carbonyl group or thiocarbonyl group to which a hydrogen atom or a carbon atom is directly bonded and is substituted with a photographically useful group which is capable of being released upon an intramolecular nucleophilic attack by the oxygen atom in the carbonyl group or the sulfur atom in the thiocarbonyl group.The precursor of photographic agent is completely stable during storage prior to use of the photographic light-sensitive material, and releases a photographic agent at a desired time upon the processing of the photographic light-sensitive material. The precursor also exhibits its function to a substantial degree in a relatively low pH range.Type: GrantFiled: May 25, 1984Date of Patent: November 19, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Mitsunori Ono, Isamu Itoh
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Patent number: 4554246Abstract: A photographic silver halide light-sensitive material is described. The material includes at least one of the compounds represented by general formula (I) as described below, their salts, and their precursors releasing the compounds of general formula (I) on cleavage under alkali conditions. ##STR1## (the symbols are as defined in the appended claims). This light-sensitive material is less subject to a variation in photographic performance during the storage, in particular, the formation of fog is prevented.Type: GrantFiled: October 13, 1983Date of Patent: November 19, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Kiyohiko Yamamuro, Yasuo Iwasa, Isamu Itoh
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Patent number: 4552837Abstract: A silver halide color photographic emulsion is described, containing at least one sensitizing dye represented by formula (I) and at least one compound represented by formula (II). The use of compounds of formula (I) in combination with compounds of formula (II) permits the spectral sensitization of photographic emulsions without extending the wavelength region of spectral sensitivity, enabling the production of a light-sensitive material of high sensitivity and reduced fog. ##STR1## (The symbols V, W.sub.1, W.sub.2, R.sub.1, R.sub.2, R.sub.3, X, n, R.sub.5, Y, X.sub.1, m.sub.1 and m.sub.2 are as defined in the appended claims).Type: GrantFiled: April 11, 1984Date of Patent: November 12, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaki Okazaki, Osami Tanabe, Satoshi Nagaoka, Yuji Mihara, Toshinao Ukai
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Patent number: 4546063Abstract: A photographic material comprises acid esters of cellulose or copolymers of acid esters of cellulose and synthetic comonomers.The invention may be used in the photographic industry for producing line and half-tone images on paper, films and cloth. Moreover, the proposed photographic material may be used for direct recording of ultraviolet radiation.Type: GrantFiled: February 4, 1985Date of Patent: October 8, 1985Inventors: Igor N. Ermolenko, Vasily D. Koshevar, Viktor S. Nedzvetsky, Galina N. Savastenko, Valentina M. Siderko, Fedor N. Kaputsky, Valentina V. Komar, Juzefa I. Nadievskaya
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Patent number: 4544628Abstract: A silver halide photographic emulsion is disclosed which includes a sensitizing dye represented by general formula (I) and a compound represented by general formula (II): ##STR1## The substituents within the general formulae are defined within the specification. The emulsion can be used to prepare a photographic material which has high green-sensitivity which is obtained without expanding the wavelength region of spectral sensitivity in the green sensitive region. Further, the resulting material has these improved results and does not show substantial change of its photographic properties such as sensitivity and amount of fogging during storage.Type: GrantFiled: February 2, 1984Date of Patent: October 1, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Yuji Mihara, Satoshi Nagaoka, Masaki Okazaki
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Patent number: 4542094Abstract: A novel silver halide emulsion is disclosed. This silver halide emulsion comprises in combination (a) silver halide made of silver chlorobromide or silver chlorobromoiodide, (b) a hydroxytetrazaindene compound and (c) a nitrogen-containing heterocyclic compound having at least one mercapto group, the grains of said silver halide having such a size distribution that the variation co-efficient is not more than 0.15.Type: GrantFiled: October 21, 1983Date of Patent: September 17, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Kunihiro Koshizuka, Syoji Matsuzaka, Takaaki Kojima
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Patent number: 4514492Abstract: Desensitization defects due to nonferrous metal contamination of a silver halide film sensitized by a cysteine-thiazolidine moiety are decreased by incorporating a chelating agent such as quinaldic or picolinic acid into one or more layers of the film.Type: GrantFiled: December 15, 1983Date of Patent: April 30, 1985Assignee: E. I. Du Pont de Nemours and CompanyInventors: Raymond J. LeStrange, John H. Bayless, Jr., Allan R. Schoenberg
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Patent number: 4504577Abstract: A silver halide photographic material is disclosed which is comprised of a support having formed thereon a light-sensitive silver halide layer and a particular compound represented by the general formulae (I), (II) and (III). The compound is utilized in the photographic material in order to prevent the occurrence of contaminations which are caused by metals intermixed in the silver halide photographic materials during production, packaging, preservation and/or processing. The presence of such compounds also prevents the deterioration of photographic materials caused by metal ions existing in processing solutions and aids in preventing the reduction in the uniformity of processing.Type: GrantFiled: February 27, 1984Date of Patent: March 12, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshinobu Yoshida, Nobuo Sakai, Takatoshi Ishikawa
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Patent number: 4503139Abstract: There are described novel photographic products and processes which utilize compounds which release a photographic reagent in the presence of alkali. The compounds include an imidazole blocking group and cleave in alkali to release the photographic reagent. Also described are novel compounds.Type: GrantFiled: May 9, 1983Date of Patent: March 5, 1985Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Roger A. Boggs, Anthony J. Puttick, Nancy M. Sofen
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Patent number: 4495274Abstract: Direct positive silver halide photographic materials comprising a support, a silver halide emulsion layer comprising fogged silver halide particles prepared in the presence of a water soluble iridium salt or a water soluble rhodium salt, and a hydrophilic colloidal layer comprising (a) a compound selected from Formula I and II and (b) at least one compound selected from the group consisting of Formula III and a gold compound, said Formula I being ##STR1## wherein R.sub.1 is hydrogen, alkyl, --SO.sub.3 M, or --COOM, wherein M is selected from hydrogen, alkali metals, and ammonium, and R.sub.2 is selected from hydrogen and lower alkyls, said Formula II being ##STR2## wherein R.sub.3 is selected from hydrogen, alkyl, --SO.sub.3 M, and --COOM, and R.sub.4 is selected from hydrogen, alkyl, and --CH.sub.2 --S--(CH.sub.2).sub.n --Y', wherein n is an integer of from 1 to 3, and Y' is selected from hydrogen and --SO.sub.3 M, and said Formula III beingH.sub.2 N--Y--NH--Y].sub.m NH.sub.Type: GrantFiled: April 21, 1983Date of Patent: January 22, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventor: Kazuhiro Yoshida
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Patent number: 4478928Abstract: The use of sulfinic acid radical substituted arylhydrazides in producing images in silver halide photographic elements is disclosed. The sulfinic acid radical substituted arylhydrazide can be incorporated in photographic silver halide, emulsions, and photographic elements. The sulfinic acid radical substituent is capable of activating the arylhydrazides, particularly for use at a lower alkaline pH. In negative working surface latent image forming emulsions the sulfinic acid radical substituted arylhydrazides permit higher speed or contrast to be achieved. In direct positive internal latent image forming emulsions increased nucleation activity and reduced rereversal can be achieved.Type: GrantFiled: May 11, 1983Date of Patent: October 23, 1984Assignee: Eastman Kodak CompanyInventors: Thomas C. Hess, Karl E. Wiegers
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Patent number: 4463088Abstract: A group of heterocyclic antifoggants based on quinoxaline is useful in very high speed gelatino-silver halide emulsions.Type: GrantFiled: July 5, 1983Date of Patent: July 31, 1984Assignee: E. I. Du Pont de Nemours and CompanyInventor: Joseph D. Overman