Patents by Inventor Toshiya Kondo

Toshiya Kondo 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: 5380640
    Abstract: A silver halide photographic light-sensitive emulsion is disclosed. The emulsion comprises silver halide grains formed under a condition in which fine grains of silver halide are supplied into the protective colloid solution, in which the silver halide grains are formed, in a period in the course of formation of the grains, andthe sum of projection area of tabular grains each having a aspect ratio larger than 1.2 accounts for lower than 50% of the total projection area of the whole silver halide grains of the emulsion, and the tabular grains have an average aspect ratio is more than 1.2 and less than 5.0 and an average grain size of not larger than 0.6 .mu.m.
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: January 10, 1995
    Assignee: Konica Corporation
    Inventors: Toshiya Kondo, Sadayasu Ishikawa
  • Patent number: 5372975
    Abstract: Disclosed is a silver halide photographic emulsion which comprises a dispersion medium and silver halide grains, wherein said silver halide grains are prepared by a process comprising the steps of:(a) preparing a dispersion medium, wherein said dispersion medium comprises a gelatin solution,(b) introducing an oxidizer into said dispersion medium; and(c) introducing silver halide seed grains.The silver halide emulsion provides a sliver halide photographic light-sensitive material high in sensitivity and excellent in pressure resistance.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: December 13, 1994
    Assignee: Konica Corporation
    Inventors: Sadayasu Ishikawa, Hiroshi Takada, Toshiya Kondo