Patents by Inventor Satoshi Kawakatsu

Satoshi Kawakatsu 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: 4071365
    Abstract: A compound represented by the general formula A-Q (wherein A represents a yellow dye image-forming coupler residue having the active methylene group from which one hydrogen atom has been replaced and Q represents a tetrazolyl group substituted at the 5-position with hydrogen, a halogen, a cyano, an alkyl, an aralkyl, an aryl, an alkyl-amino or an arylamino group) is used as a yellow dye image-forming coupler for obtaining yellow dye images that have good spectral absorption characteristics, and good stability to prolonged exposure to light, heat and high humidity.
    Type: Grant
    Filed: September 14, 1976
    Date of Patent: January 31, 1978
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Yasushi Usagawa, Kiyoshi Yamashita, Mamoru Nakatani, Kosaku Masuda, Satoshi Kawakatsu