Patents by Inventor Ryosuke Sato

Ryosuke Sato 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: 4554244
    Abstract: There is disclosed a silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: ##STR1## wherein the substituents X.sup.1, X.sup.2, Y, Z and n are as defined in the specification and claim of this application.The cyan coupler mentioned above is a novel cyan dye image-forming coupler and the photosensitive material containing the same according to the present invention has removed the various drawbacks in the prior art.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: November 19, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ryosuke Sato, Katsunori Kato, Takashi Sasaki, Hiroshi Sugita
  • Patent number: 4465766
    Abstract: There is disclosed a silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: ##STR1## wherein the substituents X.sup.1, X.sup.2, Y, Z and n are as defined in the specification and claim of this application.The cyan coupler mentioned above is a novel cyan dye image-forming coupler and the photosensitive material containing the same according to the present invention has removed the various drawbacks in the prior art.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: August 14, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ryosuke Sato, Katsunori Kato, Takashi Sasaki, Hiroshi Sugita
  • Patent number: 4451559
    Abstract: There is disclosed a silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: ##STR1## wherein the substituents X.sup.1, X.sup.2, Y, Z and n are as defined in the specification and claim of this application.The cyan coupler mentioned above is a novel cyan dye image-forming coupler and the photosensitive material containing the same according to the present invention has removed the various drawbacks in the prior art.
    Type: Grant
    Filed: August 12, 1983
    Date of Patent: May 29, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ryosuke Sato, Katsunori Kato, Takashi Sasaki, Hiroshi Sugita
  • Patent number: 4444872
    Abstract: A method for forming a silver halide color photographic image comprising forming a dye image in the presence of a phenol cyan coupler. The phenol cyan coupler has the following formula: ##STR1## wherein R is an alkyl, an aryl or a heterocyclic group; X is selected from the group consisting of an alkyl, acyloxy, acylamino, succinimide, and sulfoneamide moiety; Z is a hydrogen atom or a group capable of eliminating itself from the coupler during the coupling reaction with the oxidized product of a color developing agent; and n is an integer from 1 to 3, and when n is 2 or 3, X may be the same or different.
    Type: Grant
    Filed: August 10, 1982
    Date of Patent: April 24, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Katsunori Kato, Ryosuke Sato
  • Patent number: 4409323
    Abstract: A silver halide photographic material containing a coupler capable of releasing a photographically useful group in a controllable timing.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: October 11, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ryosuke Sato, Yuji Hotta, Katsumi Matsuura
  • Patent number: 4355100
    Abstract: A color photographic material having a light-sensitive silver halide emulsion layer containing a DIR compound having an amino group and a DIR compound having no amino group.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: October 19, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hiroshi Sugita, Shizuo Saito, Ryosuke Sato, Kiyoshi Yamashita
  • Patent number: 4075021
    Abstract: The present invention discloses a multi-layer photosensitive material for color photography in which a compound capable of reacting with an oxidation product of a developing agent to release a substance promoting bleaching of developed silver at the bleaching or blixing step after the development treatment is incorporated into at least one layer constituting said photosensitive material.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: February 21, 1978
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shoji Kikuchi, Takaya Endo, Teruo Kagami, Ryosuke Sato
  • Patent number: 4029503
    Abstract: A diffusible-dye releasing type dye consisting of a radical which reacts with an oxidation product of a color developing principal agent in a color development process to yield a substantially colorless compound and a dye residue carrying water-soluble radicals. Its photographic uses are also disclosed.
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: June 14, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Ryosuke Sato
  • Patent number: RE31893
    Abstract: A color photographic material having a light-sensitive silver halide emulsion layer containing a DIR compound having an amino group and a DIR compound having no amino group.
    Type: Grant
    Filed: July 14, 1983
    Date of Patent: May 21, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hiroshi Sugita, Shizuo Saito, Ryosuke Sato, Kiyoshi Yamashita