Patents by Inventor Nobuo Furutachi
Nobuo Furutachi 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: 5294528Abstract: There is disclosed a silver halide color photographic material having at least one silver halide emulsion layer, wherein the silver halide emulsion layer comprises a magenta coupler and a compound that can break the aggregation of azomethine dye formed from said magenta coupler and the oxdized product of the color-developing agent. The silver halide color photographic material exhibits an excellent effect that the light-fastness of image dye and the color reproduction are good.Type: GrantFiled: March 13, 1992Date of Patent: March 15, 1994Assignee: Fuji Photo Film Co., Ltd.Inventor: Nobuo Furutachi
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Patent number: 5242789Abstract: A silver halide photographic material comprising a support having thereon a silver halide emulsion layer containing at least one coupler represented by the following formulae (I) and (II): ##STR1## wherein R.sub.1 represents an alkyl group, an aryl group or a heterocyclic group; R.sub.2 or R'.sub.2 represents an alkyl group, an aryl group; and X represents a coupling split-off group liked through a nitrogen or a sulfur atom.Type: GrantFiled: June 22, 1990Date of Patent: September 7, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadahisa Sato, Nobuo Furutachi
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Patent number: 5229261Abstract: A silver halide color photographic material, which comprises a support and a silver halide emulsion layer, contains a pyrazoloazole type coupler represented by the following general formula (II) in the emulsion layer, to ensure high sensitivity and high gamma without attended by increase in fog: ##STR1## wherein R.sub.1 represents a hydrogen atom or a substituent group; X represents a hydrogen atom or a group releasable upon coupling with the oxidation product of an aromatic primary amine developing agent; or --NH--; Zb and Zc also represent a methine group, a substituted methine group, .dbd.N-- or --NH--, wherein the substituent of at least either of Zb and Zc is a tertiary alkyl group represented by ##STR2## provided that when Zc is the above-described substituted methine group having the tertiary alkyl group as a substituent, R.sub.Type: GrantFiled: September 3, 1991Date of Patent: July 20, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Ogawa, Nobuo Furutachi
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Patent number: 5183731Abstract: A silver halide color photographic light-sensitive material having, on a support, at least an emulsion layer containing a yellow coupler represented by the general formula (I) and a sparingly water soluble epoxy compound represented by the general formula (II): ##STR1## An excellent dye images with improved yellow image storability, particularly, heat and wet heat fastness can be obtained.Type: GrantFiled: January 25, 1991Date of Patent: February 2, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Osamu Takahashi, Nobuo Furutachi
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Patent number: 5182339Abstract: A pyrazoloazoleazomethine dye represented by formula (I) ##STR1## wherein, R.sub.1 represents a substituent having a Hammett's substituent constant value of at least 0.6; Za, Zb, and Zc each represents ##STR2## (wherein R.sub.2 represents a hydrogen atom or a substituent), or .dbd.N--; when Zc=Zb is a carbon-carbon double bond, it may form a part of an aromatic ring; R.sub.3, R.sub.4, and R.sub.5 each represents a hydrogen atom or a substituent; and n represents 1 or 2; said dye may form a dimer or higher polymer by combining with each other or to a polymer through a divalent or higher valent group at R.sub.1, Za, Zb, or Zc.Type: GrantFiled: December 5, 1990Date of Patent: January 26, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeki Yokoyama, Tadahisa Sato, Keizo Kimura, Nobuo Furutachi, Osamu Takahashi
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Patent number: 5118812Abstract: A pyrazoloazole series coupler having the following formula (I) ##STR1## wherein R.sub.1 represents a substituent having a Hammett's substituent constant .sigma..sub.p of at least 0.6;X represents a hydrogen atom or a group capable of being released by the coupling reaction with the oxidation product of an aromatic primary amine developing agent;Za, Zb and Zc each represents .dbd.CH--, ##STR2## (wherein R.sub.2 represents a hydrogen atom or a substituent), .dbd.N-- or --NH--;one of Za--Zb bond and Zb--Zc bond is a double bond and the other is a single bond;when Zb--Zc is a carbon-carbon double bond, this Zb--Zc may form a part of another aromatic ring;R.sub.1, R.sub.2 or X may be a divalent linking group forming a dimer, or R.sub.1 or R.sub.Type: GrantFiled: July 6, 1990Date of Patent: June 2, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeki Yokoyama, Tadahisa Sato, Keizo Kimura, Nobuo Furutachi, Osamu Takahashi
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Patent number: 5098805Abstract: There is provided a color photograph improved in preservability that has been obtained by making chemically inactive the aromatic amine type color developing agents and their oxidized product that remains in the silver halide photographic materials after color development processing. The color photograph exhibits excellent performance in that its white background can be prevented from discoloring even during long-term storage or display, and deterioration of a dye image caused by the remaining color developing agent being taken into the photographic material after the color development, bleaching, and fixing processes, or due to its oxidized product, can be prevented.Type: GrantFiled: March 19, 1990Date of Patent: March 24, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuo Furutachi, Osamu Takahashi, Masakazu Morigaki
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Patent number: 5091297Abstract: A silver halide color photographic material comprising a support having thereon at least one silver halide red-sensitive emulsion layer containing at least one cyan coupler represented by formula (I) or (II) ##STR1## wherein Za represents ##STR2## Zb represents ##STR3## Zc represents ##STR4## Y represents a hydrogen atom or a blocking group; X represents a hydrogen atom or a group which releases upon a reaction with an oxidation product or an aromatic primary amine color developing agent; R.sub.11 represents a group which is substantially not released upon reaction with an oxidation product of an aromatic primary amine color developing agent; R.sub.12 represents a hydrogen atom or a substitutent; or R.sub.11, or R.sub.12 or X may form a dimer, oligomer or polymer.The silver halide color photographic material containing the novel cyan coupler is excellent in color reproducibility and image preservability.Type: GrantFiled: June 5, 1990Date of Patent: February 25, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroo Fukunaga, Nobuo Furutachi, Genichi Furusawa
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Patent number: 5041365Abstract: The present invention provides silver halide color photographic materials having a layer which contains at least one magenta color image-forming oleophilic coupler of the following formulae (I) and/or (II) and at least one of the following formula (III): ##STR1## in which Ar represents a phenyl group which is substituted by at least one substituent selected from the group consisting of a halogen atom, an alkyl group, an alkoxy group, an alkoxycarbonyl group and a cyano group; Y represents an acylamino group or an anilino group; and Z.sub.1 represents a group capable of being removed by coupling, ##STR2## in which X represents a hydrogen atom or a substituent; Z.sub.2 represents a hydrogen atom or a group capable of being removed by coupling;W represents a hydrogen atom, an acyl group or an aliphatic or aromatic sulfonyl group;Za and Zb each represent a methine group, a substituted methine group or --N.dbd.; andX, Z.sub.Type: GrantFiled: July 19, 1990Date of Patent: August 20, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Osamu Takahashi, Hideaki Naruse, Masakazu Morigaki, Nobutaka Ohki, Nobuo Furutachi
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Patent number: 5026867Abstract: A pyrazoloazoleazomethine dye represented by formula (I) ##STR1## wherein, R.sub.1 represents a substituent having a Hammett's substituent constant value of at least 0.6; Za, Zb, and Zc each represents ##STR2## (wherein R.sub.2 represents a hydrogen atom or a substituent), or .dbd.N--; when Zc.dbd.Zb is a carbon-carbon double bond, it may form a part of an aromatic ring; R.sub.3, R.sub.4, and R.sub.5 each represents a hydrogen atom or a substituent; and n represents 1 or 2; said dye may form a dimer or higher polymer by combining with each other or to a polymer through a divalent or higher valent group at R.sub.1, Za, Zb, or Zc.Type: GrantFiled: February 5, 1990Date of Patent: June 25, 1991Inventors: Shigeki Yokoyama, Tadahisa Sato, Keizo Kimura, Nobuo Furutachi, Osamu Takahashi
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Patent number: 5001045Abstract: A silver halide color photographic material composed of a support having thereon at least one light-sensitive silver halide emulsion layer, at least one layer thereof containing a yellow coupler represented by formula (I), a sparingly water-soluble epoxy compound represented by formula (II) and a water-insoluble but organic solvent-soluble homopolymer or copolymer: ##STR1## wherein R.sub.11 represents an N-arylcarbamoyl group; and Z.sub.11 represents a group capable of being released by a reaction with the oxidation product of an aromatic primary amine color developing agent; and ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents hydrogen, an aliphatic group, an aromatic group, an aliphatic oxycarbonyl group, an aromatic oxycarbonyl group or a carbamoyl group; provided that at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents a group other than hydrogen; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 contain a total of 8 to 60 carbon atoms; and R.Type: GrantFiled: August 22, 1988Date of Patent: March 19, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuo Furutachi, Osamu Takahashi
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Patent number: 4983507Abstract: The present invention provides silver halide color photographic materials having a layer which contains at least one magenta color image-forming oleophilic coupler of the following formulae (I) and/or (II) and at least one of the following formula (III): ##STR1## in which Ar represents a phenyl group which is substituted by at least one substituent selected from the group consisting of a halogen atom, an alkyl group, an alkoxy group, an alkoxycarbonyl group and a cyano group; Y represents an acylamino group or an anilino group; and Z.sub.1 represents a group capable of being removed by coupling, ##STR2## in which X represents a hydrogen atom or a substituent; Z.sub.2 represents a hydrogen atom or a group capable of being removed by coupling;W represents a hydrogen atom, an acyl group or an aliphatic or aromatic sulfonyl group;Za and Zb each represent a methine group, a substituted methine group or --N.dbd.; andX, Z.sub.Type: GrantFiled: October 26, 1988Date of Patent: January 8, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Osamu Takahashi, Hideaki Naruse, Masakazu Morigaki, Nobutaka Ohki, Nobuo Furutachi
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Patent number: 4968591Abstract: A process for processing a silver halide color photographic material is described comprising subjecting a silver halide color photographic material comprising a support having provided thereon at least one photographic emulsion layer containing at least one kind of pyrazoloazole series magenta coupler represented by general formula (I) to photographic processing using a bath containing at least 1.times.10.sup.-4 mol/liter of a soluble iron salt as the final bath: ##STR1## wherein Za and Zb each represents .dbd.CH--, (wherein R.sub.2 represents a hydrogen atom or a substituent) or =N-; R.sub.1 represents a hydrogen atom or a substituent; X represents a hydrogen atom or a group releasably upon coupling with the oxidation product of an aromatic primary amine developing agent; when Za=Zb is a carbon-carbon double bond, the double bond may be a part of an aromatic ring; the magenta coupler may form a dimer or polymer at R.sub.1, R.sub.2 or X; when at least one of said Za and Zb is ##STR2## at least one of the R.Type: GrantFiled: October 16, 1986Date of Patent: November 6, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Takatoshi Ishikawa, Takeshi Hirose, Nobuo Furutachi
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Patent number: 4929540Abstract: A silver halide color photographic light-sensitive material comprising a support and at least one silver halide photographic emulsion layer on the support, said emulsion layer containing a 5-pyrazolone coupler having a coupling eliminable group of the following general formula (I) at the coupling site thereof: ##STR1## wherein L.sub.1 represents a substituted or an unsubstituted methylene or ethylene group; l represents 0 or 1; m represents 0 or an integer from 1 to 3; R.sub.1 represents a hydrogen atom, or a substituted or an unsubstituted alkyl, aryl or heterocyclic group; Y represents ##STR2## Q represents a single bond or nonmetal atoms necessary to complete a 5- to 8-membered ring together with ##STR3## said 5- to 8-membered ring may further have a saturated or an unsaturated ring condensed thereto; R.sub.Type: GrantFiled: July 17, 1989Date of Patent: May 29, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuo Furutachi, Takeshi Hirose
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Patent number: 4925781Abstract: A silver halide color photographic material comprising a support having thereon a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer, wherein the silver halide color photographic material contains at least one kind of pyrazoloazole type magenta coupler represented by the general formula (I) described below and the total coating amount of silver in the photographic material is 0.75 g/m.sup.2 or less. ##STR1## wherein R.sup.1 represents a hydrogen atom or a substituent; X represents a hydrogen atom or a group capable of being released upon a coupling reaction with an oxidation product of an aromatic primary amine developing agent; Za, Zb and Zc each represents a methine group, a substituted methine group, .dbd.Type: GrantFiled: October 14, 1986Date of Patent: May 15, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Genichi Furusawa, Takatoshi Ishikawa, Nobuo Furutachi, Takeshi Hirose
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Patent number: 4921968Abstract: A pyrazoloazoleazomethine dye represented by formula (I) ##STR1## wherein, R.sub.1 represents a substituent having a Hammett's substituent constant value of at least 0.6; Za, Zb, and Zc each represents .dbd.CH--, ##STR2## (wherein R.sub.2 represents a hydrogen atom or a substituent), or .dbd.N--; when Zc=Zb is a carbon-carbon double bond, it may form a part of an aromatic ring; R.sub.3, R.sub.4, and R.sub.5 each represents a hydrogen atom or a substituent; and n represents 1 or 2; said dye may form a dimer or higher polymer by combining with each other or to a polymer through a divalent or higher valent group at R.sub.1, Za, Zb, or Zc.Type: GrantFiled: December 9, 1987Date of Patent: May 1, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeki Yokoyama, Tadahisa Sato, Keizo Kimura, Nobuo Furutachi, Osamu Takahashi
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Patent number: 4910124Abstract: A color image-forming process is described, which comprises developing with a color developing solution containing an aromatic primary amine developing agent a silver halide color photographic material containing at least on pyrazoloazole coupler represented by formula (Ia) or (Ib) ##STR1## wherein R.sub.1, R.sub.1 ', R.sub.3, Za, and Zb are defined in the specification. The image-forming process of the invention provides a silver halide color photographic material having high maximum color density, showing high coloring speed, and forming color images excellent in fastness. Further, the process of the invention can reveal the above-described excellent properties using a color developing solution containing substantially no benzyl alcohol.Type: GrantFiled: November 25, 1988Date of Patent: March 20, 1990Assignee: Fuji Photo Film Co., Ltd.Inventor: Nobuo Furutachi
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Patent number: 4906555Abstract: A multilayer silver halide color photographic material comprising a reflective support and a blue-, green- and red-sensitive emulsion layer containing at least one yellow coupler (represented by the general formula (I)), magenta coupler (represented by the general formula (II)), and cyan coupler (represented by the general formula (III)), respectively, and the blue-sensitive emulsion layer also contains at least one compound represented by the general formulae (A) or (B), all compounds are as disclosed in the specification.Type: GrantFiled: November 3, 1988Date of Patent: March 6, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Takeshi Hirose, Nobuo Furutachi, Masakazu Morigaki
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Patent number: 4900655Abstract: A silver halide color photographic light-sensitive material comprising a support having provided thereon at least one silver halide emulsion layer, wherein at least one magenta coupler represented by the formula ##STR1## where the groups in the formula are defined in the specification; is dispersed in the silver halide emulsion layer in the presence of at least one high-boiling organic solvent represented by one of the formulae (II), (III), (IV) and (V): ##STR2## where the groups in the formulae are described in the specification. The a high boiling point organic solvent has a dielectric constant of not less than 4.00 at 25.degree. C. and 10 KHz.Type: GrantFiled: November 27, 1987Date of Patent: February 13, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Kiyoshi Nakazyo, Takeshi Hirose, Genichi Hurusawa, Osamu Takahashi, Nobuo Furutachi, Hidetoshi Kobayashi
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Patent number: 4898812Abstract: A silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer, said emulsion layer containing at least one cyan dye forming coupler represented by the general formula (I): ##STR1## wherein, Q.sub.1 contains at least one nitrogen atom and represents a group of atoms that are combined to form, together with a carbon atoms attached thereto a 5- or more membered nitrogen-containing heterocyclic ring;Z.sub.1 represents a hydrogen atom or a group that can be released in a coupling reaction with the oxidation product of a color developing agent;R represents an acyl group or a sulfonyl group; andR' represents a hydrogen atom or an aliphatic group having 1 to 8 carbon atoms which may be substituted with one or more substituents; anda dimer coupler or a polymer coupler may be formed through R, R', Z.sub.1 or Q.sub.1 ;and at least one color development accelerator.The silver halide color photographic material has increased D.sub.max and sensitivity.Type: GrantFiled: August 7, 1987Date of Patent: February 6, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Kozo Aoki, Nobuo Furutachi