Patents by Inventor Kyohei Okonogi

Kyohei Okonogi 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).

  • Color photographic material
    Patent number: 4228235
    Abstract: A color photographic material having stabilized dye images is described which has a compound with the formula: ##STR1## where R and R.sub.2 individually represent an alkyl group, R represents an n-valent organic group and n is an integer of from 1 to 6.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: October 14, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kyohei Okonogi, Mikio Sato, Katsuo Mogaki, Takashi Sasaki, Takashi Uchida