Patents by Inventor Yasurharu Nakamura

Yasurharu Nakamura 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: 3984247
    Abstract: A photographic light-sensitive material comprising at least one hydrophilic colloid layer containing at least one dye represented by the following formula (I): ##SPC1##wherein R.sup.1 represents an alkyl group, a carboxy group, an alkoxycarbonyl group, a carbamoyl group, an alkylcarbamoyl group, a sulfamoyl group, an alkylsulfamoyl group, an acyl group, a hydroxy group, an alkoxy group, an alkylthio group, an amino group, a ureido group, an alkylureido group, a thioureido group or an alkylthioureido group; Q represents a sulfoalkyl group, a sulfoalkoxyalkyl group or a sulfoalkylthioalkyl group; L represents a methine group; n is 0 or 1; R.sup.2 represents --OR.sup.5 or ##EQU1## wherein R.sup.5, R.sup.6 and R.sup.7 each represents a hydrogen atom or an alkyl group; R.sup.3 represents a hydroxy group, an alkoxy group or an alkyl group; and R.sup.4 represents a hydrogen atom, an alkyl group, an alkoxy group, a sulfoalkoxy group, an alkylamino group or a dialkylamino group.
    Type: Grant
    Filed: July 17, 1975
    Date of Patent: October 5, 1976
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasurharu Nakamura, Masatoshi Sugiyama, Hiroshi Sawaguchi, Teturo Nagata, Shinzo Kobayashi, Tohru Sueyoshi