Patents by Inventor Takayoshi Ohmura

Takayoshi Ohmura 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).

  • Method for hardening gelatin
    Patent number: 4057538
    Abstract: This invention relates to a method of hardening gelatin which is accomplished by combining a compound containing at least one carbo-di-imide group with a compound having at least two vinyl sulfonyl groups. This combination has application to the photographic industry by providing a method of hardening the type of gelatin which is used in a gelatin -- containing photographic layer of a light-sensitive halide photographic material.
    Type: Grant
    Filed: February 12, 1975
    Date of Patent: November 8, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Teiji Habu, Tsuneo Wada, Takashi Sasaki, Shigemasa Itoh, Takayoshi Ohmura, Hiroki Ishii, Hisashi Yamaguchi