Patents by Inventor Seto Nobuo

Seto Nobuo 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: 5478713
    Abstract: A silver halide color photographic material comprises a combination of at least one yellow dye-forming coupler of the following general formula (1) with at least one discoloration inhibitor of special amide, phosphorus or hydrazine compound type to prevent the dye images, especially the yellow dye image, formed therein from discoloring or changing their colors; ##STR1## wherein X.sup.3 represents an organic residue completing a nitrogen-containing heterocyclyl group together with ##STR2## Y represents an aromatic or heterocyclic group; and Z represents a group capable of splitting off when the coupler represented by the foregoing formula reacts with the oxidation product of an aromatic primary amine color developing agent.
    Type: Grant
    Filed: March 8, 1994
    Date of Patent: December 26, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Seto Nobuo, Ogawa Akira, Morigaki Masakazu