And Developer Other Than Or In Addition To P-phenylenediamine Or Derivative Thereof Patents (Class 430/380)
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Patent number: 4543322Abstract: A process for processing a color photographic silver halide light-sensitive material comprising processing the color photographic silver halide light-sensitive material with a color developer containing at least one compound represented by the general formula (I): ##STR1## wherein X is a hydrogen atom, an alkali metal atom, an ammonium group, an alkyl group, or an aryl group; Y is a substituent on the phenyl group and is a halogen atom, an alkyl group, an alkoxy group, an amino group, a hydroxyl group, a nitro group, a sulfonic acid group or a carboxylic acid group; and n is 0, 1, 2, 3 or 4. Color developers containing the compounds of the general formula (I) have greatly increased stability and thus even after long-term storage, can be used to produce developed materials having superior photographic properties.Type: GrantFiled: March 30, 1984Date of Patent: September 24, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Takatoshi Ishikawa, Junya Nakajima
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Patent number: 4542091Abstract: A process for forming color images, and a silver halide color photographic material for use in the process, are described, said process comprising processing with a developer containing hydroxylamine a silver halide color photographic material comprising a support having thereon at least one red-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer, and at least one blue-sensitive silver halide emulsion layer, said blue-sensitive silver halide emulsion layer being disposed at a more upper portion than other color-sensitive silver halide emulsion layers, and said color photographic material further comprising (1) a light-insensitive layer containing at least one of a yellow colored magenta-dye-forming coupler and a yellow non-diffusible organic dye between the lowermost blue-sensitive silver halide emulsion layer and the uppermost layer of the other color-sensitive silver halide emulsion layers, and (2) a light-insensitive silver halide emulsion in any layer above saType: GrantFiled: December 14, 1984Date of Patent: September 17, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Noboru Sasaki, Takatoshi Ishikawa, Keiichi Adachi
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Patent number: 4526860Abstract: A photographic process for providing a silver image enhanced by the presence of a dye in which a substantially insoluble silver salt is formed from fixed silver prior to color development in the presence of a color coupler or a dye-forming developing agent.Type: GrantFiled: July 28, 1983Date of Patent: July 2, 1985Assignee: Minnesota Mining and Manufacturing CompanyInventor: Jonathan P. Kitchin
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Patent number: 4514494Abstract: A photographic material suited for the production of (an) azine dye image(s), and having at least one silver halide emulsion layer and/or a separate layer in water-permeable relationship with such an emulsion layer which contains:(1) a heterocyclic hydrazone compound,(2) a phenol, naphthol or active methylene coupler compound capable of forming on oxidative coupling with compound (1) an azine dye,(3) an electron transfer agent or ETA-compound capable of forming a positively charged semiquinone on oxidation with exposed silver halide,(4) a reducing agent capable of reducing the thus-formed semiquinone in acidic medium, and having in the pH range of 2-5, a polarographic half-wave potential (E 1/2) which is at least 40 mV more negative (according to the European Convention) than the polarographic half-wave potential of the ETA-compound in the same pH range, said material being suited for processing with a simple aqueous alkaline liquid, and(5) an acidic medium.Type: GrantFiled: November 4, 1983Date of Patent: April 30, 1985Assignee: Agfa-Gevaert N.V.Inventors: Raymond G. Lemahieu, Wilhelmus Janssens
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Patent number: 4482626Abstract: Photographic color developer compositions containing a primary aromatic amino color developing agent and an hydroxylamine are stabilized by incorporating therein certain polyamino stabilizing agents, such as N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid. Decomposition of the hydroxylamine, in the presence of heavy metals such as iron which act to catalyze the decomposition, and resultant formation of ammonia is effectively prevented by the presence in the developer composition of such stabilizing agents. Undesirable precipitate formation is also effectively avoided.Type: GrantFiled: March 30, 1984Date of Patent: November 13, 1984Assignee: Eastman Kodak CompanyInventors: Peter J. Twist, Joseph Bailey, Stuart P. Briggs, Miroslav V. Mijovic, David T. Southby
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Patent number: 4481268Abstract: A method of forming a photographic azo or azamethine dye image in an exposed photographic silver halide element, the method of comprising the steps of (a) developing the imagewise exposed material to form an imagewise pattern of oxidized color developing agent, (b) reacting the oxidized color developing agent with a color coupler to produce an image dye, characterized in that at least one of the color developing agent and the color coupler possesses a metal chelating site such that the image dye is capable of forming a bi-, tri- or higher-dentate metallized dye, and (c) contacting the image dye with polyvalent metal ions to form a metallized dye image. Specified color developing agents include heterocyclic substituted hydrazides and specified couplers include benziso-oxazolones and 2H-pyrazolo-[3,4-b]pyridines in addition to more conventional compounds.Type: GrantFiled: April 29, 1983Date of Patent: November 6, 1984Assignee: Eastman Kodak CompanyInventors: Joseph Bailey, David Clarke, Michael W. Crawley, Peter D. Marsden, Jasbir Sidhu
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Patent number: 4465762Abstract: A method for forming a color image comprising color developing a color photographic silver halide light-sensitive material containing at least one compound represented by formula (I) ##STR1## wherein X is a hydrogen atom or an acetyl group, R is an aryl group, and each of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 is a hydrogen atom, an alkyl group, or an aryl group,using a color developer containing a p-phenylenediamine-based and/or p-aminophenol-based color developing agent and without performing black-and-white development.Type: GrantFiled: March 3, 1982Date of Patent: August 14, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Takatoshi Ishikawa, Takashi Nakamura, Kotaro Nakamura
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Patent number: 4438195Abstract: Silver halide developer compounds containing amino groups and attached in the form of a salt to ion exchangers are embedded in layers of photographic recording material comprising at least one silver halide emulsion layer. In color photographic recording materials, the silver halide emulsion layers may have color-providing compounds associated with them.Type: GrantFiled: November 3, 1982Date of Patent: March 20, 1984Assignee: Agfa-Gevaert AktiengesellschaftInventors: Friedrich-Wilhelm Kunitz, Karl-Wilhelm Schranz
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Patent number: 4423126Abstract: A new color-forming 4-(4'-secondary or tertiary-amino)anilino-1-carboxamidonaphthalene dye precursor in a photographic material and process enables formation of a dye image by means of cross-oxidation without the need for a coupling reaction. The color-forming 4-(4'-secondary or tertiary-amino)anilino-1-carboxamidonaphthalene dye precursor is useful in a photographic silver halide material for producing (i) a dye image, or (ii) a dye image and silver image. The exposed photographic material is processed to produce (a) a positive dye image, (b) a negative dye and negative silver image, (c) a negative dye image or (d) a positive dye image and a positive silver image. New naphthoquinoneimide dyes are also described.Type: GrantFiled: May 27, 1982Date of Patent: December 27, 1983Assignee: Eastman Kodak CompanyInventors: James E. Klijanowicz, Csaba A. Kovacs
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Patent number: 4419439Abstract: A process for forming a photographic image comprising imagewise exposing a silver halide photographic light-sensitive material to light and processing the silver halide photographic light-sensitive material with an alkaline processing solution, wherein the improvement comprises the silver halide photographic light-sensitive material contains a compound represented by formula (I) ##STR1## wherein R represents an alkyl group having from 6 to 22 carbon atoms, a substituted alkyl group having from 6 to 22 carbon atoms, an aryl group having from 6 to 22 carbon atoms, a substituted aryl group having from 6 to 22 carbon atoms, an alkenyl group having from 6 to 22 carbon atoms, a substituted alkenyl group having from 6 to 22 carbon atoms or an aralkyl group having from 7 to 22 carbon atoms; X represents an alkyl group having from 1 to 4 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or a halogen atom; and n represents an integer from 1 to 3.Type: GrantFiled: November 16, 1981Date of Patent: December 6, 1983Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeru Kuwazima, Eiichi Kato, Minoru Yamada
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Patent number: 4390617Abstract: The present invention is directed towards a silver halide photographic material which has a reducing agent for silver halide or a precursor thereof and a compound M.sub.1 H.sub.m (PO.sub.n).sub.i.jH.sub.2 O which generates base when heat is applied. M is a metal from the Groups IA and IIA of the Periodic Table, 1 and i are individually integers from 1 to 3, m is an integer from 0 to 4, n is 3 or 4, and j is an integer from 0 to 12.Type: GrantFiled: March 5, 1981Date of Patent: June 28, 1983Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Kenichiro Okaniwa, Toyoaki Masukawa, Kiyoshi Yamashita, Wataru Ishikawa
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Patent number: 4386155Abstract: Colored images consisting of metal-complexed azomethine dyes are prepared by chromogenic development of silver halide photographic recording materials in the presence of color couplers. The color developers contain a grouping capable of metal chelate formation adjacent to the primary amino group. The azomethine dyes are transferred into the corresponding azomethine dye/metal complexes. The complex formation is accompanied by shift of color hue and increase of light stability.Type: GrantFiled: September 3, 1981Date of Patent: May 31, 1983Assignee: Agfa-Gevaert AGInventors: Peter Bergthaller, Friedrich-Wilhelm Kunitz, Karl-Wilhelm Schranz, Erich Wolff
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Patent number: 4371603Abstract: This invention relates to amino hydroxy cyclohexenones of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are alkyl, usually containing 1 to 20 carbon atoms.In another embodiment, the present invention is directed to the use of the above-denoted compounds as photographic silver halide developing agents and to photographic processes, products and compositions employing the same.Type: GrantFiled: December 30, 1980Date of Patent: February 1, 1983Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Eva R. Karger
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Patent number: 4362795Abstract: A process for forming photographic images comprising a silver image and a dye image, comprising development processing an imagewise exposed silver halide photographic light-sensitive material containing a 4-alkoxy-1-naphthol represented by the formula (I) ##STR1## wherein R represents an alkyl group, an alkoxyalkyl group, or a hydroxyalkyl group, and the number of carbon atoms in the substituent represented by R is from 1 to 4.The process of this invention is particularly useful in the field of X-ray photography, in order to provide an image of increased density for a given silver content. A novel silver halide photographic light-sensitive material includes the above 4-alkoxy-1-naphthol in a photographic colloid layer thereof, preferably the silver halide emulsion layer.Type: GrantFiled: August 29, 1980Date of Patent: December 7, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Junkichi Ogawa, Minoru Yamada, Tsutomu Hamaoka
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Patent number: 4336322Abstract: A color photographic light-sensitive material is described containing a dye-releasing redox compound having the following formula: ##STR1## wherein G represents a hydroxy group or a group providing a hydroxy group by hydrolysis;Col represents a dye or a dye precursor;R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl group or an aromatic group, and R.sup.1 and R.sup.2 together can form a ring;R.sup.3 represents hydrogen, an alkyl group or an aromatic group;R.sup.4 can represent an alkyl group or an aromatic group;R.sup.5 can represent an alkyl group, an alkoxy group, an alkylthio group, an arylthio group, a halogen atom or an acylamino group;n is 0, 1 or 2; andR.sup.4 and an R.sup.5 together can form a heterocyclic ring, R.sup.1 and R.sup.4 together can form a heterocyclic ring, R.sup.1 and an R.sup.5 together can form a ring, R.sup.1, R.sup.2 and R.sup.3 together can form an adamantyl ring, and the total number of carbon atoms of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sub.n.Type: GrantFiled: July 18, 1980Date of Patent: June 22, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Shinsaku Fujita, Koichi Koyama, Yoshio Inagaki, Kokichi Waki
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Patent number: 4310623Abstract: A color photographic light-sensitive material is described, comprising a support having thereon a silver halide emulsion layer containing at least one coupler represented by formula (I) ##STR1## wherein R.sub.1 represents an anilino group, an acylamino group or a ureido group, R.sub.2 represents an aralkyl group, an alkyl group, or an alkenyl group, X.sub.1, X.sub.2, and X.sub.3 each represents hydrogen, an alkyl group, a halogen atom, an alkoxy group, an aryloxy group, an acylamino group, a carbamoyl group, a sulfamoyl group, a sulfonyl group or a cyano group and X.sub.1, X.sub.2, and X.sub.3 may be the same or different, and at least one of said silver halide emulsion layer and a hydrophilic colloid layer adjacent thereto containing a 1-phenyl-3-pyrazolidone compound having a diffusion resistant group in the presence of an organic solvent having a high boiling point for a photographic additive.The photographic light-sensitive material provides a magenta color image having a high sensitivity.Type: GrantFiled: December 15, 1980Date of Patent: January 12, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshiyuki Watanabe, Masakazu Morigaki
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Patent number: 4297437Abstract: A method for processing an exposed color photographic material containing a color developing agent or precursor by developing with a color developer which is replenished.Type: GrantFiled: November 24, 1980Date of Patent: October 27, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Yutaka Kaneko, Shigeto Hirabayashi, Satoshi Kawakatsu, Hidetaka Ninomiya
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Patent number: 4297438Abstract: Color images are obtained by chromogenic development of a colorphotographic material comprising several differently spectrally sensitized silver halide emulsions and color couplers associated thereto, a hydrophobic cyan coupler being incorporated by means of a hydrophobic coupler solvent and a hydrophobic yellow coupler being incorporated without a coupler solvent, when a color developing composition is used comprising a hydrophilic and a hydrophobic color developer compound. The color images have good stability of the cyan partial image to tropical conditions and good lightfastness of the yellow partial image.Type: GrantFiled: July 27, 1979Date of Patent: October 27, 1981Assignee: AGFA-Gevaert AktiengesellschaftInventors: Helmut Haseler, Heinz Meckl, Karl Lohmer, Willibald Pelz
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Patent number: 4272613Abstract: A color photographic process is described for a silver halide photographic material having at least a silver halide emulsion layer containing a dye-forming coupler, comprising developing in a color developer solution containing components (1) an aromatic primary amino color developing agent, (2) a 1-aryl-3-pyrazolidone compound having two substituents at the 4-position, and (3) at least one compound selected from compounds represented by formulae (I) and (II): ##STR1## wherein X represents a hydrocarbon group having 1 to 6 carbon atoms; R represents a carboxylic acid group, a water-soluble carboxylic acid salt group, a water-soluble carboxylic acid ester group, or a water-soluble carboxylic acid amide group; m is 1 or 2; and n is 0 or 1; and then fixing by an acid hardening fix solution.Type: GrantFiled: May 19, 1980Date of Patent: June 9, 1981Assignee: Fuji Photo Film Co., Ltd.Inventors: Haruo Shibaoka, Junkichi Ogawa
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Patent number: 4268616Abstract: A process for forming photographic images comprising a silver image and a dye image, which comprises development processing an imagewise exposed silver halide photographic light-sensitive material in the presence of a carboxy- and sulfo-free naphthalene compound wherein at least two hydrogen atoms in the naphthalene nucleus are substituted at specific positions thereof as indicated in formula (I) below, and a 3-pyrazolidone compound.Type: GrantFiled: January 18, 1980Date of Patent: May 19, 1981Assignee: Fuji Photo Film Co., Ltd.Inventors: Junkichi Ogawa, Tsutomu Hamanka
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Patent number: 4264716Abstract: Photographic color developer compositions containing a primary aromatic amino color developing agent and an hydroxylamine are stabilized by incorporating therein a combination of sequestering agents, one of which is an aminopolyphosphonic acid compound and another of which is an aromatic polyhydroxy compound. Decomposition of the hydroxylamine, in the presence of heavy metals such as iron which act to catalyze the decomposition, and resultant formation of ammonia is effectively prevented by the presence in the developer composition of this combination of sequestering agents. Undesirable precipitate formation is also effectively avoided.Type: GrantFiled: September 10, 1979Date of Patent: April 28, 1981Assignee: Eastman Kodak CompanyInventors: Sheridan E. Vincent, Michael D. Purol
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Patent number: 4258117Abstract: A method is disclosed of photographically processing a negative-working imagewise exposed silver halide photographic element to produce a reversal dye image comprising (a) developing the imagewise exposed silver halide with an electron transfer agent to produce oxidized electron transfer agent which reacts with a competing oxidizable substance and (b) developing silver halide remaining with the electron transfer agent in the presence of a dye image providing compound capable, after the competing oxidizable substance has been depleted, of reacting with the oxidized electron transfer agent to produce a reversal dye image. Image transfer film units are disclosed useful in the practice of this method. Such film units include those containing in addition to the competing oxidizable substance and initially immobile dye image providing compound a layer containing additional silver halide and a scavenger separating the additional silver halide from the immobile dye image providing compound.Type: GrantFiled: November 1, 1979Date of Patent: March 24, 1981Assignee: Eastman Kodak CompanyInventors: John Morgan, Peter D. Marsden
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Patent number: 4222777Abstract: A process for forming color images which comprises image-wise exposing a silver halide photographic material, subjecting the exposed photographic material to color development and then fixing the developed material with a fixing bath having a pH of at least 6, the process being free from a silver bleaching (elimination) step. The process is especially suitable for application to radiographic materials.Type: GrantFiled: October 14, 1977Date of Patent: September 16, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Yosuke Nakajima, Akira Ushimaru, Shinzo Kishimoto, Yoshio Seoka, Masayoshi Kawai, Naoyoshi Chino, Yoshiyuki Hoshi, Kazunori Hasebee
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Patent number: 4220470Abstract: A photographic two-equivalent magenta coupler represented by the following general formula (I): ##STR1## wherein (A) represents a residue of a magenta color image-forming coupler in which one of the hydrogen atoms in the coupling position is eliminated; Q represents an oxygen atom or NH group; and B represents the non-metallic atoms necessary to form a 5-membered or a 6-membered ring containing the nitrogen atom and the ##STR2## group. Color photographic light-sensitive materials containing the two-equivalent magenta coupler are also described.Type: GrantFiled: February 27, 1978Date of Patent: September 2, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuo Furutachi, Kotaro Nakamura, Atsuaki Arai, Minoru Yamada, Keisuke Shiba
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Patent number: 4211561Abstract: The invention is directed to a process for producing cross-linked polymeric images on a substrate employing an oxygen-insensitive silver halide system to obtain camera-speed imaging with good resolution of the resulting image. The process comprises imagewise exposing a photosensitive layer containing dispersed silver halide in operative association with a multifunctional hydrophilic polymeric coupler, developing the exposed layer with a multifunctional developing agent, and removing the undeveloped, noncross-linked areas by washing with a solvent.Type: GrantFiled: December 8, 1978Date of Patent: July 8, 1980Assignee: E. I. Du Pont de Nemours and CompanyInventor: Louis Plambeck, Jr.
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Patent number: 4209328Abstract: In a dye image forming process in color photography comprising imagewise exposing a photographic element comprising a support and a light sensitive silver halide emulsion layer, and processing the exposed photographic element with an alkaline processing solution in the presence of a dye developer whereby a dye image corresponding to the imagewise exposure is formed by oxidation of said developer as a function of development of silver halide, the improvement which comprises the dye developer being a mono azo dye developer represented by the following formula:X--N.dbd.Type: GrantFiled: June 22, 1977Date of Patent: June 24, 1980Assignees: Konishiroku Photo Industry Co., Ltd., Mitsubishi Chemical Industries LimitedInventors: Yuzuru Sato, Ryuichiro Kobayashi, Naoshi Kunieda, Kazumasa Watanabe, Noboru Mizukura, Kenji Yoshida, Tadanori Oya
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Patent number: 4205990Abstract: A process for forming a cyan dye image by using a novel photographic 2-equivalent cyan coupler which is characterized by having a splitt-off group of the below-indicated general formula at the active position of the cyan coupler so that the oxy portion is present on the side of the active position: ##STR1## wherein R.sub.1 and R.sub.2 stand for a hydrogen atom or an organic group, provided at least one of R.sub.1 and R.sub.2 should be an organic group, is disclosed.Type: GrantFiled: October 3, 1978Date of Patent: June 3, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Hidetaka Deguchi, Takaya Endo, Shoji Kikuchi, Toshiki Komaita
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Patent number: 4205987Abstract: Photographic elements, film units and processes are described wherein certain ballasted di-2,5-sulfonamidophenols are used to scavenge oxidized electron transfer agents in color image transfer materials. The scavenger compounds can be located in an emulsion layer, a dye image-providing material layer or an interlayer.Type: GrantFiled: November 15, 1978Date of Patent: June 3, 1980Assignee: Eastman Kodak CompanyInventors: Wayne F. Erikson, Robert E. Ross
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Patent number: 4204867Abstract: White couplers which are capable of reacting with color developer oxidation products to form colorless end product with the consumption of four oxidation equivalents and which, therefore have increased absorption capacity for color developer oxidation products correspond to the formula ##STR1## or its tautomeric form, in which R.sup.1 is hydrocarbyl, heterocyclyl attached through a ring carbon, or --CO--R.sup.2R.sup.2 is alkyl, aryl, alkoxy, aminoX is --S-- or --NR.sup.3 --R.sup.3 is hydrogen, same as represented by R.sup.1 or an electron-attaching group.The four-equivalent white couplers may be contained in processing solutions or, in diffusion resistant form, in one or more layers of a colorphotographic material.Type: GrantFiled: February 10, 1978Date of Patent: May 27, 1980Assignee: AGFA-Gevaert, A.G.Inventors: Karl Kuffner, Wolfgang Lassig, Ernst Meier, Immo Boie, Gertrud Kirchhoff, Helmut Haseler, Herbert Stark
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Patent number: 4203768Abstract: A silver halide color photographic material comprising a photographic silver halide emulsion containing a yellow dye-forming coupler represented by the following general formula (I) or (II): ##STR1## wherein R.sub.1 represents an alkyl group or an aryl group; R.sub.2 represents a chlorine atom or a lower alkoxy group having 1 to 4 carbon atoms; R.sub.3 and R.sub.4, which may be the same or different, each represents an alkyl group having 1 to 22 carbon atom, a phenoxyalkyl group having 7 to 32 carbon atoms, a monocyclic aralkyl group or a phenyl group, a phenyl group which is substituted with an alkoxy group, an alkyl group, an acyl group, or an alkoxycarbonyl group; and X is selected from the group consisting of groups represented by the following general formulae (III) to (V): ##STR2## wherein Z.sub.1 represents the non-metallic atoms necessary to form together with the ##STR3## moiety a 5-membered ring or a 6-membered ring, ##STR4## wherein Z.sub.Type: GrantFiled: September 26, 1978Date of Patent: May 20, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Kozo Inouye, Hideki Naito
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Patent number: 4195996Abstract: A method of recording a radiation image having excellent sharpness which comprisesimage-wise exposing to radiation, in combination with the use of a fluorescent intensifying screen, a light-sensitive photographic element comprising a water-proof opaque support, which has an average degree of reflection of about 70 percent or greater, based on the degree of reflection of a magnesium oxide white plate being 100%, in the spectral wavelength region of from about 380 m.mu. to about 600 m.mu., and having on only one surface thereof a coating of a green sensitized silver halide photographic emulsion containing a phenolic color coupler or an .alpha.-naphtholic color coupler, each capable of forming a quinoneimine dye having a maximum absorption within a spectral wavelength region of about 550 m.mu. to about 700 m.mu. on color development, where the silver halide grains of the emulsion have a number average grain size of about 0.5.mu. to about 2.2.mu. and are present in an amount of from about 0.Type: GrantFiled: February 28, 1978Date of Patent: April 1, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Yosuke Nakajima, Yoshiyuki Hoshi, Takayoshi Fukuoka
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Patent number: 4192680Abstract: A process for developing an image-wise exposed light-sensitive silver halide color photographic material comprising developing said material with a solution containing a specified concentration range of bromide ion in the presence of at least one of certain active point substitution type yellow couplers.Type: GrantFiled: May 24, 1978Date of Patent: March 11, 1980Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Isamu Fushiki, Atushi Kamitakahara, Keiichi Mori
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Patent number: 4189319Abstract: Arginine or an acid addition salt thereof is used as a development accelerator in the color development of color photographic materials, either in the color developer bath or in the color photographic material.Type: GrantFiled: July 18, 1975Date of Patent: February 19, 1980Assignee: GAF CorporationInventor: Burton H. Waxman