Patents by Inventor Toshio Kawagishi
Toshio Kawagishi 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: 5437965Abstract: A silver halide color photographic material comprising a support having thereon at least one yellow coupler-containing blue-sensitive silver halide emulsion layer (BL), at least one magenta coupler-containing green-sensitive silver halide emulsion layer (GL) and at least one cyan coupler-containing red-sensitive silver halide emulsion layer (RL); wherein the weight-averaged wavelength of the spectral sensitivity distribution of GL (.lambda..sub.G) of the photographic material is between 520 nm and 580 nm (520 nm.ltoreq..lambda..sub.G .ltoreq.580 nm), the weight-averaged wavelength of the spectral sensitivity distribution of RL (.lambda..sub.R) of the photographic material is between 590 nm and 650 nm (590 nm.ltoreq..lambda..sub.R .ltoreq.650 nm), and the weight-averaged wavelength of the spectral sensitivity distribution of BL (.lambda..sub.B) of the photographic material is between 430 nm and 480 nm (430 nm.ltoreq..lambda..sub.B .ltoreq.Type: GrantFiled: December 20, 1994Date of Patent: August 1, 1995Assignee: Fuji Photo Film Co., Ltd.Inventors: Minoru Uchida, Toshio Kawagishi, Shunichi Tomita
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Patent number: 5385814Abstract: A silver halide color photographic light-sensitive material having blue-, green-, and red-sensitive silver halide emulsion layers contains a pyrazoloazole-type compound which releases a development inhibitor in at least one layer and contains an acylacetamide-type yellow coupler having a novel acyl group in at least one layer.Type: GrantFiled: November 27, 1992Date of Patent: January 31, 1995Assignee: Fuji Photo Film Co., Ltd.Inventors: Minoru Uchida, Toshio Kawagishi, Yasuhiro Yoshioka
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Patent number: 5312726Abstract: A silver halide color light-sensitive material including a support having thereon at least one hydrophilic colloidal layer is disclosed, wherein the hydrophilic colloidal layer contains a DIR coupler represented by formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group; R.sup.2 represents an organic group; X and Y each represent --N.dbd. or ##STR2## wherein R.sup.Type: GrantFiled: March 11, 1991Date of Patent: May 17, 1994Assignee: Fuji Photo Film Co., Ltd.Inventors: Keiji Mihayashi, Seiji Ichijima, Toshio Kawagishi, Naoki Saito, Masuji Motoki
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Patent number: 5194369Abstract: A silver halide color light-sensitive material containing a coupler represented by formula (I): ##STR1## wherein R.sub.1 represents a substituted or unsubstituted alkyl group; R.sub.2 and R.sub.3, same or different, each represent a group capable of substituting a benzene ring; Y represents a halogen atom, an alkoxy group, an alkoxycarbonyl group, a substituted or unsubstituted alkyl group, an alkylthio group, an aryloxy group, an alkylsulfonyl group, an arylthio group, or a carbamoyl group; X represents an organic residue necessary to form a substituted or unsubstituted 5- or 6-membered nitrogen-containing heterocyclic ring together with the nitrogen atom; l represents 0 or an integer of from 1 to 5; and m represents 0 or an integer of from 1 to 4.The coupler of formula (I) is excellent in dye image stability.Type: GrantFiled: March 12, 1991Date of Patent: March 16, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Keiji Mihayashi, Seiji Ichijima, Toshio Kawagishi, Naoki Saito, Masuji Motoki
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Patent number: 5021329Abstract: In accordance with the present invention a silver halide photographic material having at least one silver halide emulsion layer on a base, which comprises at least one of compound having a dye precursor residue is disclosed. The silver halide photographic material is high in sensitivity and improved in color reproduction.Type: GrantFiled: January 27, 1989Date of Patent: June 4, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshio Kawagishi, Atsuhiro Ohkawa, Seiji Ichijima
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Patent number: 5002860Abstract: A novel process for processing a silver halide color photographic material is disclosed, which comprises color-developing a silver halide color photographic material which has been imagewise exposed to light, and then processing the silver halide color photographic material with a processing solution having a bleaching ability, wherein the silver halide color photographic material comprises at least one magenta coupler represented by formula (M-1) and the processing solution having a bleaching ability comprises as a bleaching agent (1) at least one of ferric complex salts of compounds selected from Compound Group (A) and (2) a ferric 1,3-diaminopropanetetraacetate complex salt in a molar proportion of the (1) to the (2) of 3 or less:Compound Group (A)A-1: Ethylenediaminetetraacetic acidA-2: Diethylenetriaminepentaacetic acidA-3: Cyclohexanediaminetetraacetic acidA-4: 1,2-Propylenediaminetetraacetic acid ##STR1## wherein Za and Zb each represents --CH.dbd., ##STR2## or .dbd.N--; R.sub.1 and R.sub.Type: GrantFiled: February 21, 1989Date of Patent: March 26, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Takatoshi Ishikawa, Toshio Kawagishi
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Patent number: 4931382Abstract: A silver halide color photographic light-sensitive material containing a combination of a pyrazolo-azole magenta coupler and a specific dye image stabilizing agent is disclosed. The stabilizing agent is effective to improve fastness of a dye image formed by the coupler to light, heat and moisture.Type: GrantFiled: September 12, 1989Date of Patent: June 5, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Masakazu Morigaki, Toshio Kawagishi, Kiyoshi Nakazyo, Nobuo Seto, Sadao Kamei
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Patent number: 4882266Abstract: A silver halide color photographic material comprising a support having coated thereon at least one silver halide emulsion layer, in which said silver halide emulsion layer or a layer adjacent thereto contains a pyrazoloazole magenta coupler having at least one substituted alkyl group represented by the formula (I): ##STR1## wherein [A] represents a pyrazoloazole magenta coupler residual group; R.sup.1 is an alkyl group; R.sup.2 and R.sup.3 each is a hydrogen atom or a substituent, provided that both R.sup.2 and R.sup.3 are not hydrogen atoms at the same time; and n is 1, 2 or 3.Type: GrantFiled: February 7, 1989Date of Patent: November 21, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshio Kawagishi, Kiyoshi Nakazyo
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Patent number: 4865963Abstract: A silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer, said silver halide emulsion layer containing a pyrazoloazole series magenta coupler represented by general formula [I] ##STR1## wherein, R.sup.1 and R.sup.2 each represents a hydrogen atom or a substituent; and X represents a hydrogen atom or a releasing group which is released at the reaction with the oxidation product of an aromatic primary amine developing agent; at least one of said R.sup.1 and R.sup.2 is an alkyl group having a secondary or tertiary carbon atom directly bonded to the skeleton, at least one of said R.sub.1 and R.sub.2 is a sulfonamidoalkyl group or a sulfamoylalkyl group; and the magenta coupler may form a dimer or more polymer at the position of said R.sup.1, R.sup.2 or X.By the combined use of high boiling point organic solvent and ultraviolet absorbent, light fastness and coloring property are markedly improved.Type: GrantFiled: September 30, 1986Date of Patent: September 12, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuo Furutachi, Tadahisa Sato, Seiki Sakanoue, Akio Mitsui, Minoru Sakai, Masakazu Morigaki, Hidetoshi Kobayashi, Nobuo Sakai, Kiyoshi Nakazyo, Takeshi Hirose, Toshio Kawagishi
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Patent number: 4845282Abstract: The present invention provides an industrially very advantageous process for producing prostaglandins E.sub.1 with fewer steps and in higher yield. The process comprises reacting a 7-hydroxyprostaglandin E with a reactive derivative of an organic sulfonic acid in the presence of a basic compound to form the corresponding 7-organic sulfonyloxyprostaglandin E, treating the resulting 7-organic sulfonyloxyprostaglandin E, after or without isolation, in the presence of a basic compound to form a .DELTA..sup.7 -prostaglandin E, thereafter selectively reducing the carbon-carbon unsaturated bond existing on the .alpha.-chain. Some of the 7-hydroxyprostaglandins E and .DELTA..sup.7 -prostaglandins E used in the process are novel compounds.Type: GrantFiled: January 21, 1988Date of Patent: July 4, 1989Assignee: Teijin LimitedInventors: Ryoji Noyori, Masaaki Suzuki, Toshio Kawagishi, Seizi Kurozumi
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Patent number: 4822730Abstract: A silver halide color photographic material comprising a support having formed thereon at least one silver halide emulsion layer containing a pyrazoloazole series magenta coupler having at least one group expressed by the formula [S] below at a position other than the coupling active position.--(A).sub.n --L--B [S]wherein A represents a substituted or unsubstituted alkylene group, a substituted or unsubstituted cycloalkylene group, a substituted or unsubstituted arylene group, or a substituted or unsubstituted aralkylene group, in which in the main chain of said alkylene group, cycloalkylene group, arylene group, or aralkylene group, --O--, --S--, --CO--, --CO.sub.2 --, --OCO--, ##STR1## may be contained; L represents ##STR2## B represents a hydrogen atom or a substituted or unsubstituted alkyl or aryl group which does not contain therein --SO.sub.2 --; n is 0 or 1; and R and R' each represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group.Type: GrantFiled: May 28, 1987Date of Patent: April 18, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuo Furutachi, Toshio Kawagishi, Kiyoshi Nakazyo
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Patent number: 4774172Abstract: Silver halide color photographic materials are described, which comprise at least one silver halide emulsion layer coated on a support and which are characterized by the incorporation of a pyrazoloazole type coupler of the following general formula (I) into the silver halide emulsion layer(s) or the adjacent layer(s) thereto: ##STR1## wherein Za and Zb each may represent ##STR2## R.sup.1 and R.sup.2 each may represent a hydrogen atom or a substituent; X represents a hydrogen atom or a group capable of being removed upon a coupling reaction with an oxidized form of an aromatic primary amine type developing agent; when Za.dbd.Zb is a carbon-carbon double bond, this may be a part of the aromatic ring in the formula: with the proviso that at least one of R.sup.1 and R.sup.2 is a group represented by general formulae (II) or (III): ##STR3## wherein R.sup.3 represents a hydrogen atom or a substituted or unsubstituted alkyl group; R.sup.4 represents a hydrogen atom or a substituent; R.sup.Type: GrantFiled: November 28, 1986Date of Patent: September 27, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshio Kawagishi, Takayoshi Kamio, Keizo Kimura, Tadahisa Sato, Nobuo Furutachi
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Patent number: 4735893Abstract: A silver halide color photographic light-sensitive material containing a combination of a pyrazolo-azole magenta coupler and a specific dye image stabilizing agent is disclosed. The stabilizing agent is effective to improve fastness of a dye image formed by the coupler to light, heat and moisture.Type: GrantFiled: June 10, 1985Date of Patent: April 5, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Masakazu Morigaki, Toshio Kawagishi, Kiyoshi Nakazyo, Nobuo Seto, Sadao Kamei
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Patent number: 4705863Abstract: Pyrazolo[1,5-b][1,2,4]triazole derivatives are produced by ring closure of an amidoxime compound having a pyrazolyl group. The product can be used as a photographic magenta coupler as such. It is also useful as an intermediate for the magenta coupler, as a dye developer for diffusion transfer process, as an intermediate for the dye releasing agent, and as an intermediate for the photographic sensitizing dye.Type: GrantFiled: March 20, 1985Date of Patent: November 10, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadahisa Sato, Toshio Kawagishi, Nobuo Furutachi
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Patent number: 4659652Abstract: A silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer, wherein said material includes at least one magenta coupler of 1H-pyrazolo(1,5-b)(1,2,4)triazole type in which a substituted or unsubstituted aryloxy group is attached to the coupling active site to heighten coloring efficiency and speed, and further to ensure excellent light-fastness to the dye formed therefrom.Type: GrantFiled: August 23, 1985Date of Patent: April 21, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshio Kawagishi, Kiyoshi Nakazyo
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Patent number: 4639413Abstract: A silver halide color photographic material is described, comprising a support having formed thereon at least one silver halide emulsion layer having dispersed therein, in a coexisting state, at least one magenta coupler represented by formula (I) and at least one high-boiling point organic solvent represented by the formula (II) ##STR1## wherein R.sup.1 and R.sup.2 each represents a hydrogen atom or a substituent and x represents a hydrogen atom or a group capable of being released by a coupling reaction with the oxidation product of an aromatic primary amine developing agent; andwherein R.sup.3, R.sup.4, and R.sup.5 each represents an alkyl group, a cycloalkyl group, or an alkenyl group, and the total number of carbon atom of the groups R.sup.3, R.sup.4 and R.sup.5 is from 12 to 60.Type: GrantFiled: August 14, 1985Date of Patent: January 27, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshio Kawagishi, Kiyoshi Nakazyo
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Patent number: 4621046Abstract: A novel pyrazolo[1,5-b]-1,2,4-triazole derivative represented by the general formula (I) is described. ##STR1## wherein R.sub.1 and R.sub.2 which may be the same or different, each represents a hydrogen atom or a substituent; X represents a hydrogen atom or a group capable of being released upon coupling; and Y represents a hydrogen atom or an aralkyl group.Type: GrantFiled: February 19, 1985Date of Patent: November 4, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadahisa Sato, Toshio Kawagishi, Nobuo Furutachi
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Patent number: 4607003Abstract: A photographic element comprising a support and at least one silver halide emulsion layer. The photographic element contains at least one layer containing at least one of the dyes represented by the following formula (I), (II), (III), (IV), (V), (VI), (VII) or (VIII): ##STR1## wherein Z.sub.1 to Z.sub.10 ; R.sub.1 to R.sub.24 ; L.sub.1 to L.sub.18 ; Y.sub.1 to Y.sub.8 ; Q.sub.1 to Q.sub.4 ; X.sub.1 to X.sub.3 ; Ar; h, m, p and r; and t.sub.1 to t.sub.3 are described in the specification.Type: GrantFiled: April 9, 1985Date of Patent: August 19, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshinao Ukai, Tadahisa Sato, Toshio Kawagishi, Haruo Takei
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Patent number: 4590153Abstract: A silver halide color photographic material comprising a support having thereon at least a silver halide photographic layer, and photographic material contains (1) at least one magenta coupler containing at least one coupler moiety derived from the compound selected from the group consisting of compounds represented by following formula (I) and (2) at least one metal complex selected from the group consisting of compounds represented by following formula (II), (III), (IV) and (V): ##STR1## wherein X represents a hydrogen atom or a coupling releasing group; R.sup.1 represents a hydrogen atom or a substituent, Za, Zb and Zc each represents a methine group; a substituted methine group; a methylene group, a substituted methylene group, .dbd.N--, or --NH--; one of the Za-Zb bond and the Zb-Zc bond being a double bond and the other being a single bond; ##STR2## wherein M represents Cu, Co, Ni, Pd or Pt; R.sup.2, R.sup.3, R.sup.4 and R.sup.Type: GrantFiled: October 29, 1984Date of Patent: May 20, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshio Kawagishi, Nobuo Furutachi
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Patent number: H131Abstract: Silver halide color photographic materials contain pyrazoloazole type magenta couplers having at least one hydroxyphenyl group bonded thereto. The silver halide color photographic materials are improved in color developability and color image light fastness. The pyrazoloazole type magenta couplers are 5-membered ring/5-membered ring condensed nitrogen heterocyclic type couplers.Type: GrantFiled: September 9, 1985Date of Patent: September 2, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuo Furutachi, Tadahisa Sato, Toshio Kawagishi, Kiyoshi Nakazyo