Patents by Inventor Kei Sakanoue

Kei Sakanoue 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).

  • Patent number: 5017466
    Abstract: A color-forming aminopyrimidine coupler represented by formula (I): ##STR1## where R.sub.1, R.sub.2, and R.sub.3 independently represent a hydrogen atom, a halogen atom, an alkoxy group, an aryloxy group, a heterocyclic-oxy group, an alkylthio group, an arylthio group, a heterocyclic-thio group, a substituted or unsubstitued amino group, a heterocyclic group bonding to the pyrimidine ring via a nitrogen atom thereof, an alkyl group or an aryl group; provided that at least one of R.sub.1, R.sub.2 and R.sub.3 is an unsubstituted or substituted amino group, and that when any one of R.sub.1, R.sub.2 or R.sub.3 contains a sulfonic acid group or a salt thereof, R.sub.1 , R.sub.2 or R.sub.3 contains at least one linear or branched alkyl group and that the total carbon atoms in the alkyl group(s) are to be more than 8; and R.sub.
    Type: Grant
    Filed: May 23, 1990
    Date of Patent: May 21, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hidetoshi Kobayashi, Reiichi Ohi, Kei Sakanoue
  • Patent number: 4975359
    Abstract: A silver halide color photographic light-sensitive material is described, containing: (1) a non-diffusing coupler forming a dye on reacting with an oxidation product of a color developing agent, said dye having diffusibiity of the extent that it exhibits controlled smearing; and (2) a DIR compound releasing a diffusing development inhibitor or its precursor through a coupling reaction. This light-sensitive material is improved in both granularity and sharpness, and has high sensitivity.
    Type: Grant
    Filed: May 9, 1989
    Date of Patent: December 4, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Noboru Sasaki, Kei Sakanoue, Seiji Ichijima, Hidetoshi Kobayashi, Keiichi Adachi
  • Patent number: 4966835
    Abstract: A method for processing a silver halide color photographic material is described, comprising a support having thereon at least one of a silver halide emulsion layer and other hydrophilic colloid layer, wherein the silver halide emulsion layer or other hydrophilic colloid layer contains at least one compound represented by formula (I):A--B (I)wherein A represents a blocking group capable of being cleaved from B during processing and B represents a bleach accelerating agent containing at least one hetero atom linked to A through the hetero atom, wherein said method comprises at least one color developing step and desilvering step comprising a bleach-fixing treatment.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: October 30, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tetunori Matushita, Morio Yagihara, Kei Sakanoue
  • Patent number: 4960688
    Abstract: A silver halide color photographic material is described comprising a support having thereon at least one silver halide emulsion layer, wherein the silver halide color photographic material contains a water-soluble polymer comprising at least one repeating unit represented by formula (I) ##STR1## wherein A represents a vinyl repeating unit having a color coupler moiety which is capable of forming a dye upon coupling with an oxidation product of an aromatic primary amine developing agent;and at least one repeating unit selected from the group consisting of formulae (II-A), (II-B), (II-C), (II-D), (II-E), and (II-F): ##STR2## The water-soluble polymer is a photographic polymeric coupler incorporating a crosslinkable group with gelatin and the silver halide color photographic material containing the water-soluble coupler is excellent in layer strength and image sharpness.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: October 2, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kei Sakanoue, Yoshio Ishii, Tsumoru Hirano
  • Patent number: 4959299
    Abstract: A silver halide color photographic material is disclosed comprising at least one silver halide emulsion layer on a support, wherein at least one type of development inhibitor releasing type coupler is present which, by means of a coupling reaction with the oxidized form of a primary aromatic amine developing agent, releases a precursor of a compound, the precursor inhibiting the development of silver halide which subsequently, by means of an electron transfer reaction via an ethylenic conjugated chain, releases a compound which inhibits the development of silver halide, and at least one type of bleach accelerating agent releasing type coupler is present which, by means of a coupling reaction with the oxidized form of primary aromatic amine developing agent, releases a bleach accelerating agent or a precursor thereof.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: September 25, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kei Sakanoue, Hidetoshi Kobayashi, Seiji Ichijima, Shinji Ueda
  • Patent number: 4952490
    Abstract: A photographic light-sensitive material comprises a support having thereon at least one silver halide emulsion layer. At least 70% of a total number of silver halide grains contained in the emulsion layer are regular crystal grains not having a twinning plane. At least 50 mol% of the regular grains are silver chloride. The regular crystal grains have a (111) crystal plane on 30% or more of a total grain surface and are chemically sensitized in the presence of a gold compound or sulfur and gold compounds.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: August 28, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shunji Takada, Toshihiro Nishikawa, Kei Sakanoue, Akira Abe
  • Patent number: 4937179
    Abstract: A silver halide color photographic material comprising a support having thereon a silver halide emulsion layer, wherein the silver halide color photographic material contains a two-equivalent magenta polymer coupler which is capable of forming a color image upon coupling with an oxidation product of an aromatic primary amine developing agent and has an oil pKa' of 8.0 or more.The two-equivalent magenta polymer coupler has an excellent color forming property, an improved conversion efficiency to a dye and an improved resistivity to decreases in color forming property upon the attack of chemical substances and is free from the formation of undesirable fog when preserved under conditions of high temperature or of high temperature and high humidity.The silver halide color photographic material has a reduced layer thickness and an improved sharpness.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: June 26, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tsumoru Hirano, Kei Sakanoue
  • Patent number: 4886736
    Abstract: A silver halide color photographic material comprising (1) at least one coupler and (2) at least one compound represented by formula (I) ##STR1## wherein EAG represents a group capable of accepting an electron from a reducing substance; R.sup.1 and R.sup.2 each represents a chemical bond or a divalent substituent, or R.sup.1 and R.sup.2 are linked together to form a cyclic structure when linked with (Time).sub.t PUG; or R.sup.1 and R.sup.2 each represents a substituent, or R.sup.1 and R.sup.2 are linked together to form a cyclic structure when not linked with (Time).sub.t PUG; Time represents a group capable of releasing PUG, which is released by the cleavage of the single bond between the oxygen atom and the nitrogen atom in the compound; t represents 0 or 1; PUG represents a photographically useful group; and the dotted lines mean that at least one of them forms a chemical bond, and a method for forming an image using the material.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: December 12, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koki Nakamura, Kei Sakanoue, Seiji Ichijima
  • Patent number: 4880726
    Abstract: A method of forming a color image wherein a color print original is printed on a printing color photographic material and the thus printed material is then subjected to color development to give a color print, which is characterized in that a band stop filter having a half width of the spectral transmittance curve of said filter in a wavelength range outside the region of the maximum spectral sensitivity wavelength (.lambda.max).+-.20 nm of at least one light-sensitive layer of the printing color photographic material is provided between the light source to be used in said printing step and the light-sensitive layer of said printing color photographic material, and in that a compound of a general formula (I):(C.sub.p).X (I)wherein C.sub.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: November 14, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Seiji Ichijima, Kei Sakanoue, Seiichi Taguchi
  • Patent number: 4865962
    Abstract: A photographic light-sensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, characterized in that the emulsion layer contains silver chlorobromide prepared in such a manner that silver halide regular crystal grains, having no twinning crystal plane and containing 50 mol % or more of silver chloride, are used as host grains, an organic compound is adsorbed on a surface of each of the host grains, and sulfur-plus-gold sensitization is performed, either during or after halide conversion in the presence of a bromide.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: September 12, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazunori Hasebe, Masahiro Asami, Naoto Ohshima, Keisuke Shiba, Toshihiro Nishikawa, Kei Sakanoue, Akira Abe
  • Patent number: 4865959
    Abstract: A silver halide color photographic material having on a support at least one silver halide emulsion layer, wherein the color photographic material contains at least one compound releasing a bleach accelerator upon reaction with the oxidation product of an aromatic primary amine color developing agent and at least one cyan dye-forming coupler represented by formula (A); ##STR1## wherein R.sub.1 represents a substituted or unsubstituted aliphatic group, a substituted or unsubstituted aromatic group; or a substituted or unsubstituted heterocyclic group; X represents a hydrogen atom or a group capable of releasing upon a coupling reaction with the oxidation product of an aromatic primary amine color developing agent; and Ar represents an aromatic group having at least one substituent, wherein the sum of the .sigma..sub.m and .sigma..sub.p values of the substituent is at least 0.67.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: September 12, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kei Sakanoue, Hidetoshi Kobayashi
  • Patent number: 4842994
    Abstract: A silver halide photographic material is described, comprising a support having provided thereon at least one silver halide photographic emulsion layer and comprising a bleach accelerator-releasing coupler, wherein said bleach accelerator-releasing coupler is represented by formula (I)A--(TIME).sub.n --S--X--(Y).sub.m --(Z)l]a (I)wherein A represents a coupler residual group; TIME represents a timing group; n represents 0 or 1; X represents a cyclic aliphatic group or a saturated heterocyclic group; Y represents an aliphatic group having from 1 to 8 carbon atoms which may contain a group of --O--, a group of --S--, a group of --COO--, a group of --CO--, a group of ##STR1## a group of ##STR2## a group of --SO.sub.2 --or a group of ##STR3## in its chain; m represents an integer of from 0 to 3, and when m represents 2 or more, the two or more Y groups may be the same or different; Z represents a group of --OH, a group of --COOM, a group of --SO.sub.
    Type: Grant
    Filed: November 12, 1987
    Date of Patent: June 27, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kei Sakanoue, Seiji Ichijima
  • Patent number: 4812389
    Abstract: A process for processing a DIR coupler-containing silver halide color photographic material for photographing use in a continuous manner with replenishment of a developer is disclosed in which said DIR coupler is a coupler which has in a coupling site a group that functions as a development inhibitor or a development inhibitor precursor upon being eliminated from the coupling active site by color development processing and that will be decomposed to a compound exerting substantially no influences on photographic properties after flowing into a color developing solution, said development inhibitor having a half-value period of 4 hours or shorter than that at a pH of 10.0, and in which the developing solution is replenished in an amount of 700 ml or less per m.sup.2 of developed light-sensitive materials.
    Type: Grant
    Filed: September 25, 1986
    Date of Patent: March 14, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kei Sakanoue, Seiji Ichijima, Shinzo Kishimoto
  • Patent number: 4791051
    Abstract: A silver halide color photographic material is disclosed, comprising a support and at least silver halide emulsion layers on the support, wherein at least one of said emulsion layers contains at least one 2-equivalent 5-pyrazolone polymer coupler and at least one of the other emulsion layers contains at least one phenol cyan coupler having an acylamino group in the 5-position and a ureido group in the 2-position. The present material is advantageous over conventional materials in that the color balance of the image dyes remains unchanged over long periods of time.
    Type: Grant
    Filed: May 13, 1986
    Date of Patent: December 13, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kei Sakanoue, Tsumoru Hirano
  • Patent number: 4789624
    Abstract: A silver halide color photographic light-sensitive material which contains a high speed reactive type coupler having a relative coupling speed of 0.35 to 1.0 and a compound represented by the following general formula (I): ##STR1## wherein R represents a hydrogen atom, a substituted or unsubstituted aliphatic group, a substituted or unsubstituted aromatic group, or a substituted or unsubstituted heterocyclic group.The silver halide color photographic light-sensitive material provides color images having greatly improved graininess in both high density areas and low density areas, without adversely affecting sensitivity.
    Type: Grant
    Filed: April 21, 1987
    Date of Patent: December 6, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kei Sakanoue, Shigeo Hirano, Takehiko Ueda, Keiichi Adachi
  • Patent number: 4789626
    Abstract: A method for processing a silver halide color photographic material by fixing or bleach-fixing the material and immediately thereafter subjecting it to washing or stabilization, wherein (A) the silver halide color photographic material contains at least one of sensitizing dyes represented by the formulae (I) and (II) specified in the specification and at least one two-equivalent magenta polymer coupler which is derived from a specified monomer coupler, and (B) the amount of a replenisher in the washing step and/or the stabilization step falls within the range of 3 to 50 times, based on unit area of the material after being processed, the amount of each processing solution having been carried over from the preceding bath.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: December 6, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kei Sakanoue, Shinzo Kishimoto, Tadashi Ikeda
  • Patent number: 4764454
    Abstract: A novel silver halide color photographic material is provided comprising a compound of the general formula (I):LIG-A-LVG (I)wherein A represents a group which reacts with an oxidation product of a developing agent to cleave the bond to LVG; LVG represents a coupling-off group; and LIG represents a group which reacts with metal ions to form a complex compound.A novel method of processing the instant silver halide color photographic material is provided including a processing step using a processing solution of an iron (II) ion concentration of 1.times.10.sup.-6 to 1 mol/l. In the processing step, the potential of a bath having a bleaching capacity containing an aminopolycarboxylic acid-iron (III) complex salt is 150 mV or less.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: August 16, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Seiji Ichijima, Kei Sakanoue
  • Patent number: 4745048
    Abstract: A quick desilvering process of silver halide color photographic materials is provided, wherein the total amount of coated silver is 5.2 g/m.sup.2 or less, an average iodide content in the whole light-sensitive silver halide grains is 5.5 mol % or less; and a 2-equivalent magenta polymer coupler is included as a magenta coupler, and bleach-fixing treatment, or bleaching treatment at a pH of 5.5 or less, or desilvering treatment in the presence of a specific desilvering accelerator is carried out. Silver halide color photographic materials which permit the quick desilvering are also provided. These contain a specific desilvering accelerator.
    Type: Grant
    Filed: June 5, 1986
    Date of Patent: May 17, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinzo Kishimoto, Kei Sakanoue, Noboru Sasaki
  • Patent number: 4668613
    Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon a silver halide emulsion layer containing a polymer coupler which is capable of forming a dye upon coupling with an oxidation product of an aromatic primary amine developing agent and which is polymerized using a polymerization initiator represented by the following general formula (I): ##STR1## wherein R.sub.1 represents a straight chain or branched chain alkyl group having from 1 to 5 carbon atoms; an R.sub.2 represents a straight chain or branched chain alkyl group having from 1 to 20 carbon atoms.The polymer coupler according to the present invention has a good stability to humidity and heat during storage of the silver halide color photographic light-sensitive material containing thereof and provides decreased formation of fog in non-image areas of color photographs obtained by means of color development processing of the silver halide color photographic light-sensitive material.
    Type: Grant
    Filed: April 19, 1985
    Date of Patent: May 26, 1987
    Assignee: Fuji Photo Film Co. Ltd.
    Inventors: Morio Yagihara, Tsumoru Hirano, Tatsuya Yamamoto, Kei Sakanoue
  • Patent number: H789
    Abstract: A novel method for processing a silver halide color photographic material. The process comprises imagewise exposing a silver halide color photographic light-sensitive material to light, color-developing the light-sensitive material, and then desilvering the light-sensitive material, wherein: (a) said silver halide color photographic light-sensitive material contains a compound which reacts with an oxidation product of anaromatic primary amine color developing agent to form a bleaching accelerator, (b) the desilvering step is conducted with a processing solution containing a ferric complex salt of an organic acid, and (c) the total amount of replenisher of the processing solution to be used in the desilvering step satisfies either the following conditions (i) or (ii):(i) the total amount of replenisher is 1,000 ml or less per m.sup.2 of the light-sensitive material if the coated amount of silver per m.sup.2 of the light-sensitive material is 2.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: June 5, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinji Ueda, Kei Sakanoue, Seiji Ichijima, Hidetoshi Kobayashi