Patents by Inventor Kenichiro Okaniwa

Kenichiro Okaniwa 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).

  • Light-sensitive silver halide color photographic material
    Patent number: 4241172
    Abstract: A silver halide color photographic material comprising a coupler represented by the following general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 individually represent a substituted or unsubstituted alkyl, alkenyl, aryl, cycloalkyl group, or,-A-X).sub.n ].sub.m Cp in which Cp represents a cyan coupler, magenta coupler or yellow coupler, A represents a substituted or unsubstituted divalent aliphatic group, X represents a divalent group, and m and n individually represent a value of 0 or 1, provided that at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is -A-X).sub.n ].sub.m Cp.
    Type: Grant
    Filed: May 24, 1979
    Date of Patent: December 23, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kenichiro Okaniwa, Takashi Uchida, Morio Kobayashi, Hiroshi Sugita, Takashi Sasaki