Patents by Inventor Takekimi Shiozawa

Takekimi Shiozawa 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: 5665530
    Abstract: A silver halide emulsion which comprises at least one dispersion medium and silver halide grains, wherein not less than 30% of the total projected area of the silver halide grains accounts for tabular grains each (i) having a {100} face as a major face, (ii) having an aspect ratio (diameter/thickness) of not less than 1.5, and (iii) having a nucleus during nucleus formation, the nucleus being present within the square of not more than 10% of the entire projected area of each of said silver halide grains when viewed the silver halide grains from the vertical direction to the major faces, the square containing one corner of each of said silver halide grains.
    Type: Grant
    Filed: August 30, 1995
    Date of Patent: September 9, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takayoshi Oyamada, Takekimi Shiozawa, Seiji Yamashita
  • Patent number: 4853322
    Abstract: A light-sensitive silver halide emulsion is disclosed, which comprises light-sensitive silver halide grains in a binder, wherein tabular grains having a diameter of at least 0.15 .mu.m account for at least 70% of the total projected area of said silver halide grains, said tubular grains have a mean aspect ratio of not more than 8.0, and at least 50% (by number) of all of said tabular grains are tabular grains in which the ratio (b/a) of the thickness (b) of said tabular grain to the longest spacing (a) between two or more parallel twinning planes of said tabular grain is at least 5. A color photographic material using the light-sensitive silver halide emulsion for at least one of the silver halide emulsion layers other than the outermost silver halide emulsion layer is also disclosed.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: August 1, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsumi Makino, Yuichi Ohashi, Hiroshi Takehara, Yoichi Suga, Takekimi Shiozawa