Patents by Inventor Tetunoti Matushita

Tetunoti Matushita 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).

  • Direct positive silver halide photosensitive material and method for forming direct positive image
    Patent number: 4952483
    Abstract: The present invention relates to a direct positive silver halide photosensitive material and a method for forming a direct positive image. By the use of a novel nucleating agent having a specific structural formula, the present invention provides a direct positive silver halide photosensitive material with an increased Dmax value and a decreased Dmin value, as compared with the use of the conventional nucleating agents, even if a small amount of the novel nucleating agent is used, and does not substantially reduce the Dmax value, even if the photosensitive material is kept in a high-humidity state for a long time before exposure.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: August 28, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Noriyuki Inoue, Morio Yagihara, Hisashi Okada, Tetunoti Matushita, Satoshi Nagaoka, Tetsuro Kojima