Patents by Inventor Sadanobu Shuto

Sadanobu Shuto 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: 4675279
    Abstract: A silver halide photographic light-sensitive material is described, which comprises a support having thereon at least one layer comprising a silver halide emulsion containing tabular silver halide particles wherein at least 50% of the total projected area of silver halide particles contained in the silver halide emulsion in said at least one layer is occupied by the tabular silver halide particles having an average aspect ratio of 5:1 or more, and wherein said silver halide emulsion contains a compound represented by general formula (I) or (II): ##STR1## wherein a is an integer of 1 to 8;R.sub.1, R.sub.2 and R.sub.3, which are the same or different, each represents a group of the formula --CH.sub.2 (CF.sub.2).sub.b H or a substituted or unsubstituted alkyl group, with the proviso that at least one of R.sub.1, R.sub.2 and R.sub.
    Type: Grant
    Filed: July 24, 1985
    Date of Patent: June 23, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Sadanobu Shuto, Toshinao Ukai, Shunichi Aida
  • Patent number: 4626498
    Abstract: A color reversal photographic light-sensitive material is described having at least one light-sensitive silver halide emulsion layer, wherein at least one of said emulsion layer and a layer adjacent thereto contains a silver halide emulsion of silver halide grains containing internal fog centers.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: December 2, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Sadanobu Shuto, Yasuhiro Hayashi, Munehisa Fujita, Kazunori Hasebe
  • Patent number: 4608334
    Abstract: A silver halide color light-sensitive material having improved graininess is described, comprising a support having provided thereon at least two emulsion layers that are sensitive to the same color light but have different sensitivities, wherein a light-insensitive intermediate layer comprising gelatin is provided between any two of said emulsion layers that are adjacent to each other and the higher sensitivity emulsion layer of said two layers has a smaller silver/coupler molar ratio than that of the lower sensitivity emulsion layer of said two emulsion layers.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: August 26, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Sadanobu Shuto, Munehisa Fujita, Kazunori Hasebe