Patents by Inventor Tadanori Oya

Tadanori Oya 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).

  • Dye image forming process
    Patent number: 4209328
    Abstract: In a dye image forming process in color photography comprising imagewise exposing a photographic element comprising a support and a light sensitive silver halide emulsion layer, and processing the exposed photographic element with an alkaline processing solution in the presence of a dye developer whereby a dye image corresponding to the imagewise exposure is formed by oxidation of said developer as a function of development of silver halide, the improvement which comprises the dye developer being a mono azo dye developer represented by the following formula:X--N.dbd.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: June 24, 1980
    Assignees: Konishiroku Photo Industry Co., Ltd., Mitsubishi Chemical Industries Limited
    Inventors: Yuzuru Sato, Ryuichiro Kobayashi, Naoshi Kunieda, Kazumasa Watanabe, Noboru Mizukura, Kenji Yoshida, Tadanori Oya
  • Dye image forming process using shifted azo dye developer
    Patent number: 4099972
    Abstract: A process for forming a dye image on a receiving element by diffusion transfer from a photosensitive element is disclosed wherein the exposed photosensitive element is processed with an alkaline solution in the presence of a particular dye developer having at least one azo radical.
    Type: Grant
    Filed: July 28, 1976
    Date of Patent: July 11, 1978
    Assignees: Mitsubishi Chemical Industries Limited, Konishiroku Photo Industry Co., Ltd.
    Inventors: Yuzuru Sato, Ryuichiro Kobayashi, Naoshi Kunieda, Kazumasa Watanabe, Noboru Mizukura, Kenji Yoshida, Tadanori Oya