Patents by Inventor Yoshiro Shigetomi

Yoshiro Shigetomi 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).

  • Silver halide color photographic light-sensitive material comprising a solid particle dispersion of a spectral sensitizing dye, and having a total coating wt of Ag less than 4 G/M.sup.2
    Patent number: 5436122
    Abstract: A silver halide color photographic light sensitive material comprising a support having thereon light-sensitive silver halide emulsion layers, and a nonlight-sensitive hydrophilic colloidal layer, wherein the color photographic material has a coating weight of silver of not more than 4.0 g per m.sup.2 of a photographic material and an ISO speed of 25 or more, and wherein a silver halide emulsion contained in at least one of the light-sensitive emulsion layers is spectrally sensitized by a process comprising (i) forming a dispersion of a substantially water-insoluble spectral sensitizing dye in the form of solid particles dispersed in an aqueous medium which is free from an organic solvent or a surfactant and (ii) incorporating the dispersion in the silver halide emulsion.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: July 25, 1995
    Assignee: Konica Corporation
    Inventor: Yoshiro Shigetomi
  • Silver halide color photographic light-sensitive material
    Patent number: 4992357
    Abstract: A silver halide color photographic light-sensitive material having an excellent adhesion resistance and capable of preventing deterioration of quality of processed images is disclosed. The light-sensitive material having a support and provided thereon, the photographic component layers including each at least one red-sensitive layer comprising at least a masking cyan coupler, green-sensitive layer comprising at least a masking magenta coupler, and blue-sensitive layer, is characterized by that:A. an uppermost layer of said photographic component layers comprises an alkali-soluble matting agent,B. a total amount of coated silver is 15 to 45 mg/dm.sup.2.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: February 12, 1991
    Assignee: Konica Corporation
    Inventors: Yoshihiro Haga, Hiroshi Shimazaki, Atsuo Ezaki, Yoshiro Shigetomi
  • Light-sensitive silver halide color photographic material with non-diffusable light-insensitive dye layer
    Patent number: 4746600
    Abstract: Disclosed is a light-sensitive silver halide color photographic material in which a DIR compound capable of releasing a diffusible development inhibitor or precursor thereof by the reaction with an oxidized form of a color developing agent is employed in combination with a non-diffusible dye and which sastisfies Condition A and B recited in the specification.By using the color light-sensitive material according to the present invention, the sharpness, particularly the edge effect (including the fringe effect and the border effect) of a photographic image has been greatly improved.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: May 24, 1988
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yoshikazu Watanabe, Hiroshi Shimazaki, Toshifumi Iijima, Yoshiro Shigetomi, Toshihiko Yagi