Patents by Inventor Noboru Mizukura
Noboru Mizukura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5254451Abstract: A silver halide color photographic light sensitive material comprising a magenta represented by Formula I-3 or I-4 is disclosed. ##STR1## R.sub.1, R.sub.2 and R.sub.4 represent each a substituent; X represents a hydrogen atom or a group capable of splitting off;Y represents a group consisting of non-metal atoms necessary to form a 5- or 6-membered heterocyclic ring;m is 1 or 2; andn is 0 to 4.The invention provides a silver halide color photographic light sensitive material having exellent color reproducibility and color producibility, in which material stability against light of magenta dye image is remarbly improved.Type: GrantFiled: September 22, 1992Date of Patent: October 19, 1993Assignee: Konica CorporationInventors: Hiroshi Kita, Yutaka Kaneko, Noboru Mizukura, Toru Kubota
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Patent number: 5215877Abstract: Disclosed are a yellow coupler represented by the following formula (I) and a light-sensitive silver halide color photographic material having at least one silver halide emulsion layer on a support, which comprises a two-equivalent yellow coupler represented by the following formula (I) being contained in at least one of the above silver halide emulsion layers: ##STR1## wherein R.sub.1 represents an alkyl group or a cycloalkyl group; R.sub.2 represents an alkyl group, a cycloalkyl group or an aryl group; R.sub.3 represents a straight unsubstituted alkyl group having 8 to 20 carbon atoms; X represents >NR.sub.4, --O-- or --S(O).sub.n --; Y represents >NR.sub.5 or ##STR2## where R.sub.4 and R.sub.5 each represent an alkyl group, a cycloalkyl group or an aryl group; and R.sub.6 and R.sub.7 each represent hydrogen atom, --OR.sub.8, ##STR3## and --S(O).sub.P R.sub.8 (where R.sub.8 represents an alkyl group, a cycloalkyl group and an aryl group; R.sub.Type: GrantFiled: August 21, 1991Date of Patent: June 1, 1993Assignee: Konica CorporationInventors: Atsushi Tomotake, Noboru Mizukura
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Patent number: 5082766Abstract: A silver halide color photographic light-sensitive material is disclosed. The light-sensitive material comprises a greensen-sitive silver halide emulsion layer which contains a coupound represented by the following formula T and a magenta coupler represented by the following formula M-I: ##STR1## in formula T, R.sub.1 and R.sub.2 each is a hydrogen atom or an alkyl group; R.sub.3 and R.sub.4 each is a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; R.sub.5 and R.sub.6 each is a hydrogen atom, an alkyl group, an aryl group, an acyl group or an alkoxycarbonyl group; X is a divalent group including a carbon atom as the component of the 6-member ring of formula T; and n is an integer of zero, 1 or 2. In formula M-I, Z is a group of non-metal atoms necessary to form a nitrogen-containing heterocyclic ring; Xs is a hydrogen atom or a splitting off substitutent; and R.sub.9, R.sub.10 and R.sub.11 each is a hydrogen atom or a substituent provided that two or three groups represented by R.sub.Type: GrantFiled: May 1, 1990Date of Patent: January 21, 1992Assignee: Konica CorporationInventors: Toyoki Nishijima, Masaki Tanji, Noboru Mizukura, Shuichi Sugita
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Patent number: 5071738Abstract: The present invention relates to a silver halide photographic material that has at least one photographic constituent layer on a support, which photographic material is characterized in that said at least one photographic constituent layer contains a dispersion obtained by emulsifying and dispersing at least one hydrophobic, photographically useful material and at least one polymer compound that is water-insoluble but soluble in organic solvents and which has a phenolic hydroxyl group.Type: GrantFiled: February 15, 1990Date of Patent: December 10, 1991Assignee: Konica CorporationInventors: Noboru Mizukura, Hakubun Ohashi, Shuichi Sugita
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Patent number: 5066574Abstract: A silver halide photographic light-sensitive material which contains a noble 2-equivalent yellow coupler having an excellent color forming property and an improved dispersion stability in emulsion is disclosed.Type: GrantFiled: October 1, 1990Date of Patent: November 19, 1991Assignee: Konica CorporationInventors: Toru Kubota, Mayumi Tomotake, Hidenobu Ohya, Atsushi Tomotake, Noboru Mizukura
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Patent number: 5063148Abstract: A silver halide light-sensitive photographic material which is capable to form magenta dye image of substantially improved light-fastness and to form non-colored portion free from Y-stain is disclosed. The material comprises compounds represented by general formula M-I and II in the layers separately or together.Type: GrantFiled: April 3, 1990Date of Patent: November 5, 1991Assignee: Konica CorporationInventors: Shuichi Sugita, Noboru Mizukura, Junichi Kohno, Kenzi Kadokura, Atsushi Tomotake
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Patent number: 5023169Abstract: A silver halide light-sensitive color photographic material which is capable of forming a dye image of improved spectral absorption characteristic, resulting in the improved color reproducibility as well as in the image preservability and which has a high maximum density is disclosed. The material comprises a green-sensitive silver halide emulsion layer containing a magenta coupler having the following Formula [M-I], ##STR1## wherein Z, X and R is as defined in the description; and a blue-sensitive silver halide emulsion layer contains a yellow coupler having the following Formula [Y-I]; ##STR2## wherein R.sub.21, R.sub.22, R.sub.23, n, R.sub.24, J and X.sub.1 are respectively as defined in the description.Type: GrantFiled: December 15, 1989Date of Patent: June 11, 1991Assignee: Konica CorporationInventors: Shigeto Hirabayashi, Mayumi Tsuruta, Noboru Mizukura
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Patent number: 4992360Abstract: A silver halide light-sensitive photographic material comprising a support and, provided thereon, at least one silver halide emulsion layer containing a dye-forming coupler of Formula [I]: ##STR1## wherein R.sub.1 is an alkyl group or a cycloalkyl group; R.sub.2 is an alkyl group, a cycloalkyl group, an acyl group or an aryl group; R.sub.3 is a group which is substituted to a benzene ring; n is an integer of zero or 1; R.sub.4 is an organic group containing one linkage group containing a carbonyl unit or a sulfonyl unit; J is a ##STR2## wherein R.sub.5 is a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; and X.sub.1 is a group capable of being split off upon reaction with the oxidation product of a color developing agent.Type: GrantFiled: May 11, 1989Date of Patent: February 12, 1991Assignee: Konica CorporationInventors: Mayumi Tsuruta, Noboru Mizukura, Satoshi Nakagawa
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Patent number: 4914013Abstract: A silver halide color photographic light-sensitive material is disclosed, which contains a magenta coupler having a specific ballast group. The light-sensitive material is improved in solubility in an organic solvent, dispersibility and stability of dispersion in a silver halide emulsion. The coupler is represented by the following Formula M-1; ##STR1## wherein R.sup.2 and R.sup.3 are each a substituent provided that and at least one of which has a group represented by the following Formula I; and X is a hydrogen atom or a group capable of being split off upon reaction with the oxidation produce of a color developing agent; ##STR2## wherein R.sup.1 is a hydrogen atom or a normal or branched alkyl group having 1 to 20 carbon atoms.Type: GrantFiled: March 2, 1989Date of Patent: April 3, 1990Assignee: Konica CorporationInventors: Satoru Ikesu, Noboru Mizukura
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Patent number: 4745049Abstract: A silver halide photographic light-sensitive material improved in the color fastness of yellow dye images against light is disclosed. The photographic material comprises a silver halide emulsion layers containing a compound represented by General Formula [I] and a yellow coupler represented by General Formula [II]: ##STR1## wherein J is an alkylene group, R.sub.1 through R.sub.3 are each substituents and n is an integer 1 to 3, ##STR2## wherein R.sub.11 and R.sub.12 are each a hydrogen atom or substituents and R.sub.13 is a hydrogen atom or a substituent and Z.sub.1 is a group capable of being splitted of from the coupler residue upon reaction of the coupler with the oxidized product of a color developing agent.Type: GrantFiled: April 7, 1987Date of Patent: May 17, 1988Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Keiji Ohbayashi, Akiyoshi Tai, Noboru Mizukura
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Patent number: 4576911Abstract: A silver halide color photographic light-sensitive material containing a magenta dye-forming polymeric coupler.Type: GrantFiled: September 4, 1984Date of Patent: March 18, 1986Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Noboru Mizukura, Noboru Fujimori, Kosaku Masuda, Shinji Yoshimoto, Noriki Tachibana, Eiichi Ueda
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Patent number: 4460682Abstract: A novel silver halide photographic element which contains a nondiffusible complex capable of releasing a diffusible, photographically useful material is disclosed.Said nondiffusible complex becomes active for ligand exchange upon reduction under alkalin conditions to release a diffusible, photographically useful material, said complex being represented by the following formula: ##STR1## wherein La is a quadridentate ligand group; Lb is a didentate ligand group; BALL is a ballast group; PHOTO is a photographically useful material group; Y is a counter ion; and r is the number of counter ions necessary for neutralizing the electric charge on the CO(III) complex.Type: GrantFiled: December 15, 1982Date of Patent: July 17, 1984Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Noboru Mizukura, Satoru Ikeuchi, Shunji Suginaka, Noriko Fujita
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Patent number: 4421846Abstract: A photographic element containing a nondiffusible metal complex capable of releasing a diffusible photographically useful group. The complex contains at least one poly-dentate ligand which contains the photographically useful group. The complex may be activated when reduced under alkaline conditions to release the photographically useful group.Type: GrantFiled: December 23, 1981Date of Patent: December 20, 1983Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Satoru Ikeuchi, Masaru Kanbe, Jiro Takahashi, Ryuichiro Kobayashi, Shunji Suginaka, Noboru Mizukura
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Patent number: 4407941Abstract: A photographic element comprising a support provided thereon with at least one light-sensitive silver halide emulsion layer containing a nondiffusible compound which receives at least one electron in an alkaline condition to release a photographically useful material and a nondiffusible electron donor or a precursor thereof having the following formula (I) or (II): ##STR1## wherein R.sup.1 represents hydrogen, an alkyl, an aryl or a heterocyclic group, R.sup.2 represents hydrogen, an alkyl, an aryl, a heterocyclic, an amino, a carbamide, a sulfonamide, a sulfamoyl, a carbamoyl or a ureido group, R.sup.3 and R.sup.4 each is hydrogen, --COR.sup.5, --SO.sub.2 R.sup.6 or --CSR.sup.7 wherein R.sup.5 and R.sup.6 each is a substituted or unsubstituted, respectively, alkyl, alkenyl, aryl, heterocyclic, alkylamino, alkyloxy, aryloxy, alkylthio, arylthio, alkyloxycarbonyl or aryloxycarbonyl group, and R.sup.7 is a substituted or unsubstituted alkyllamino or arylamino group, said R.sup.Type: GrantFiled: March 8, 1982Date of Patent: October 4, 1983Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shunji Suginaka, Ryuichiro Kobayashi, Satoru Ikeuchi, Noboru Mizukura, Noriko Fujita
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Patent number: 4407938Abstract: A photographic element comprising a support having thereof at least one silver halide emulsion layer and at least one temporary barrier layer, said temporary barrier layer comprising a mixture of a lactone polymer with repetitive units represented by the formula (I): ##STR1## and a vinylidene chloride terpolymer represented by the formula (II): ##STR2## wherein R is a hydrogen atom, an alkyl or an aralkyl group; R.sup.1, R.sup.2 and R.sup.3 each is a hydrogen atom or a methyl group; n.sup.1 is an integer of from 1 to 5, while n.sup.2 is an integer of 1 or 2; A is a monomer unit of a copolymerizable ethylenically unsaturated acid or of the salt thereof, while B is a copolymerizable ethylenically unsaturated monomer unit; x represents from 50 to 99.5% by weight, y represents from 0.5 to 44.5% by weight, and z represents from 0 to 49.5% by weight.Type: GrantFiled: April 19, 1982Date of Patent: October 4, 1983Assignee: Konishiroku Photo Ind. Co., Ltd.Inventors: Noboru Mizukura, Mikio Koyama
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Patent number: 4304850Abstract: A photographic element for color diffusion transfer which includes a timing layer comprising a polymeric latex made up of (1) a conjugated diene monomer, (2) and ethylenically unsaturated acid monomer or salt, and (3) an ethylenically unsaturated monomer, which monomers are within certain percentage ranges.Type: GrantFiled: July 1, 1980Date of Patent: December 8, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Mikio Koyama, Satoru Ikeuchi, Noboru Mizukura, Hideaki Iwama
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Patent number: 4277553Abstract: A silver halide emulsion containing an image dye-forming substance and a hydroquinone compound containing at least one electron attracting group as a color fog inhibiting agent.Type: GrantFiled: September 19, 1979Date of Patent: July 7, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Kaoru Onodera, Noboru Mizukura, Ryuichiro Kobayashi
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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: 4099972Abstract: A process for forming a dye image on a receiving element by diffusion transfer from a photosensitive element is disclosed wherein the exposed photosensitive element is processed with an alkaline solution in the presence of a particular dye developer having at least one azo radical.Type: GrantFiled: July 28, 1976Date of Patent: July 11, 1978Assignees: Mitsubishi Chemical Industries Limited, Konishiroku Photo Industry Co., Ltd.Inventors: Yuzuru Sato, Ryuichiro Kobayashi, Naoshi Kunieda, Kazumasa Watanabe, Noboru Mizukura, Kenji Yoshida, Tadanori Oya