Patents by Inventor Sinichi Ichikawa

Sinichi Ichikawa 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 photographic material
    Patent number: 5932409
    Abstract: A silver halide photographic material is described, which contains at least one compound represented by the following formula (S1): ##STR1## wherein R.sub.11 represents an alkyl group, an acyl group, an alkoxycarbonyl group, a carbamoyl group, a sulfonyl group, or a sulfamoyl group; R.sub.12 represents a hydrogen atom, an alkyl group or an acyl group, provided that when R.sub.11 represents an alkyl group, R.sub.12 represents an alkyl group, R.sub.11 and R.sub.12 may be linked with each other to form a 5- to 7-membered ring; R.sub.13 represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; R.sub.14 represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; and L represents --CO--, --SO.sub.2 -- or --SO--.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: August 3, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masato Taniguchi, Takashi Hoshimiya, Sinichi Ichikawa, Mamoru Sakurazawa, Junichiro Hosokawa