Patents by Inventor Hirozo Ueda

Hirozo Ueda 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).

  • Process for improving image-sharpness of photographic silver halide material
    Patent number: 4229525
    Abstract: A photographic silver halide emulsion containing silver halide grains having an average grain size of from 0.3 to 3.0 microns in diameter as a light sensitive element in a dispersing medium and additionally containing super fine grains of silver halide having an average grain size of less than 0.2 microns in diameter is disclosed.
    Type: Grant
    Filed: November 29, 1976
    Date of Patent: October 21, 1980
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Hirozo Ueda
  • Color photographic light-sensitive material
    Patent number: 4157917
    Abstract: A color photographic light-sensitive material which comprises a support having thereon at least a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, a yellow filter layer and a blue-sensitive silver halide layer, in which the green-sensitive layer comprises a first green-sensitive silver halide emulsion layer and a second green sensitive silver halide emulsion layer and the relative positionwise relationship of each layer is in the order of the red-sensitive silver halide emulsion layer, the first green-sensitive silver halide emulsion layer, the yellow filter layer, the blue-sensitive silver halide emulsion layer and the second green-sensitive silver halide emulsion layer from the support.
    Type: Grant
    Filed: November 12, 1974
    Date of Patent: June 12, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hirozo Ueda, Yasuo Aotsuka
  • Multilayer multicolor photographic materials
    Patent number: 4040829
    Abstract: An incorporated-dye image forming coupler type multilayer multicolor photographic material comprising a support having thereon at least two silver halide emulsion layers each of which is sensitive to a different spectral wavelength range, with the silver halide emulsion layer which first receives light at image exposure being positioned so that the light is received through a non-sensitive hydrophilic layer containing a semidiffusible color coupler which forms a dye image having a substantially complimentary color to the sensitive wavelength range of the silver halide emulsion layer first receiving light at image exposure and which has a diffusion coefficient of from about 0.25 to 0.80 as defined by the relationshipdiffusion coefficient = D.sub.B /D.sub.Awherein D.sub.A is the color density formed by the color coupler where the color coupler is present in the same layer as silver halide particles, developed without imagewise exposure, and D.sub.
    Type: Grant
    Filed: June 4, 1975
    Date of Patent: August 9, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideki Ohmatsu, Hirozo Ueda