Patents by Inventor Mitsuhiro Kubotera

Mitsuhiro Kubotera 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 EMULSION, PREPARATION METHOD OF SILVER HALIDE EMULSION, SILVER HALIDE LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL, SILVER HALIDE LIGHT-SENSITIVE COLOR PHOTOGRAPHIC MATERIAL, AND IMAGE FORMING METHOD
    Patent number: 6677112
    Abstract: A silver halide emulsion containing silver halide grains comprising silver chlorobromide grains or silver chloroiodobromide grains, wherein each of silver halide grains has a silver chloride content of not less than 98% and comprises a silver bromide-containing layer having a silver bromide content of 0.5 to 5%, and the silver bromide-containing layer is located at a depth of 0 to 0.01 &mgr;m from the surface of the grain. A silver halide emulsion comprising silver halide grains containing Compound A having adsorptivity to silver, wherein each of the silver halide grains has a silver chloride content of not less than 90% has a core-shell structure comprised of a core and shell having different contents of Compound A each other, and the content of Compound A in the shell is smaller than the content of Compound A in the core.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: January 13, 2004
    Assignee: Konica Corporation
    Inventors: Shuji Murakami, Yuji Tanaka, Mitsuhiro Kubotera, Koichiro Kuroda
  • Silver halide emulsion, preparation method of silver halide emulsion, silver halide light-sensitive photographic material, silver halide light-sensitive color photographic material, and image forming method
    Publication number: 20030203328
    Abstract: A silver halide emulsion containing silver halide grains comprising silver chlorobromide grains or silver chloroiodobromide grains, wherein each of silver halide grains has a silver chloride content of not less than 98% and comprises a silver bromide-containing layer having a silver bromide content of 0.5 to 5%, and the silver bromide-containing layer is located at a depth of 0 to 0.01 &mgr;m from the surface of the grain. A silver halide emulsion comprising silver halide grains containing Compound A having adsorptivity to silver, wherein each of the silver halide grains has a silver chloride content of not less than 90% has a core-shell structure comprised of a core and shell having different contents of Compound A each other, and the content of Compound A in the shell is smaller than the content of Compound A in the core.
    Type: Application
    Filed: January 3, 2003
    Publication date: October 30, 2003
    Inventors: Shuji Murakami, Yuji Tanaka, Mitsuhiro Kubotera, Koichiro Kuroda
  • Method for manufacturing a silver halide emulsion
    Patent number: 5338655
    Abstract: A method of manufacturing a silver halide emulsion wherein spectral sensitizing dyes are added after the formation of silver halide grains, and chemically ripening is then carried out at a temperature higher than the addition temperature of the spectral sensitizing dyes at 25.degree. C. to 55.degree. C., is disclosed. A material produced by this method has a high linearity in gradation between the medium density part and the shoulder part, and having a high Dmax value.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: August 16, 1994
    Assignee: Konica Corporation
    Inventors: Mitsuhiro Kubotera, Makoto Kajiwara