Patents by Inventor Yoshihiko Shibara

Yoshihiko Shibara 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).

  • Silver halide color photographic material and processing process therefor
    Patent number: 4952488
    Abstract: Silver halide color photographic materials, and processes for processing photographic materials, are described, involving the use of at least one of a compound represented by formula (I) and a compound represented by formula (II) ##STR1## wherein A represents an n-valent aliphatic linkage group, an aromatic linkage group or a heterocyclic group (when n is 1, A represents an aliphatic group, aromatic group, heterocyclic group, or hydrogen atom); X represents --O--, --S--, or ##STR2## (wherein, R.sup.4 represents a lower alkyl group); R.sup.1 and R.sup.2 each represents a substituted or unsubstituted lower alkyl group; R.sup.3 represents a lower alkylene group; said R.sup.1 and R.sup.2, said R.sup.1 and A, said R.sup.1 and R.sup.3, said R.sup.2 and A, or said R.sup.2 and R.sup.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: August 28, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keiji Mihayashi, Akira Abe, Yoshihiko Shibara, Shinji Ueda, Shunishi Aida, Hiroshi Fujimoto