Patents by Inventor Momotoshi Tsuda

Momotoshi Tsuda 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: 4587207
    Abstract: A color image-forming process is described, comprising developing an exposed silver halide light-sensitive material with an aromatic primary amine color developing agent in the presence of an .alpha.-acyl-.alpha.-unsubstituted or substituted phenoxyacetanilide type yellow coupler having a sulfamoyl group in an m-position of the acetanilido group with respect to the amino group.
    Type: Grant
    Filed: September 26, 1984
    Date of Patent: May 6, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Momotoshi Tsuda, Jun Arakawa
  • Patent number: 4511649
    Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer is described, the color photographic light-sensitive material containing a coupler having at the coupling position thereof a group represented by formula (I) ##STR1## wherein Z represents an oxygen atom or a sulfur atom; R.sub.1 and R.sub.2 each represents a halogen atom, an alkyl group, an aryl group, an aralkyl group, an alkoxy group, an aryloxy group, a cyano group, a nitro group, a hydroxy group, a carboxy group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonamido group, an arylsulfonamido group, an alkylsulfamoyl group, an arylsulfamoyl group, an acylamino group, an amino group, an alkylcarbamoyl group, an arylcarbamoyl group, an alkylsulfonyl group, an arylsulfonyl group, an alkylcarbonyl group or an arylcarbonyl group; X.sub.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: April 16, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Ogawa, Momotoshi Tsuda
  • Patent number: 4336327
    Abstract: A silver halide color photographic light-sensitive material containing a yellow color coupler represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom, a methyl group or a halogen atom; R.sub.4 represents an aryl group which may be substituted; and X.sub.1 represents a hydrogen atom or a group capable of coupling off.The color photographic light-sensitive material provides a yellow color image having exceptional fastness to light.
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: June 22, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsugu Tanaka, Momotoshi Tsuda