Patents by Inventor Sigeharu Koboshi

Sigeharu Koboshi 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).

  • Method of processing silver halide color photographic materials and a processing apparatus therefor
    Patent number: 5254442
    Abstract: A method of processing silver halide color photographic material is disclosed. The process comprises a step of color development, a step of processing with a processor having a bleaching power and a step of stabilization, wherein an air-time ratio at a step of color development, or a step of processing with a processor having a bleaching power is 15 to 65%.
    Type: Grant
    Filed: January 8, 1991
    Date of Patent: October 19, 1993
    Assignee: Konica Corporation
    Inventors: Satoru Kuse, Sigeharu Koboshi, Masayuki Kurematsu
  • Process for treating light-sensitive silver halide color photographic materials
    Patent number: 4277556
    Abstract: Process for treating a light-sensitive silver halide color photographic material which comprises removing, after color development of the imagewise exposed light-sensitive silver halide color photographic material, the image silver with a bath containing hydrogen peroxide or a hydrogen peroxide releasing compound in combination with at least one compound selected from the group of lower alkyl aliphatic carboxylic acid, alkylidene diphosphonic acid and an alkali metal salt thereof under the conditions of forming substantially no dye image.
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: July 7, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Sigeharu Koboshi, Isamu Fushiki, Kenro Sakamoto
  • Process for the treatment of photographic materials
    Patent number: 4138257
    Abstract: In the processing of developed imagewise exposed silver halide photographic material with a solution having fixing ability, the fixing efficiency is improved and environmental pollution prevented by employing a solution containing bromine ions or iodine ions as the fixing agent and incorporating in said solution or in a post-bath solution, a polymer having in its molecular structure pyrrolidone nucleus units and a molecular weight of about 2,000 to 500,000.
    Type: Grant
    Filed: May 2, 1977
    Date of Patent: February 6, 1979
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Isamu Fushiki, Sigeharu Koboshi, Sadatugu Terada
  • Photographic bleach-fixer
    Patent number: 4040837
    Abstract: This invention is directed to a bleach-fix which is stable, excellent in bleach-fix efficiency, applicable to the processing of high-speed, light sensitive silver halide color photographic materials and free from problems of environmental pollution.
    Type: Grant
    Filed: December 2, 1975
    Date of Patent: August 9, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kenro Sakamoto, Isamu Fushiki, Sigeharu Koboshi