Patents by Inventor Katsushige Kamada

Katsushige Kamada 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: 5534395
    Abstract: A method of processing a silver halide color photographic material by processing with a color developing solution an imagewise exposed silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer and immediately thereafter processing said photographic material with a bleach-fixing solution, wherein said bleach-fixing solution contains an imidazole compound represented by the following formula (.alpha.) and the replenishment rate of said bleach-fixing solution is 200 ml or less per m.sup.2 of the photographic material: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, a hydroxyalkyl group having from 1 to 5 carbon atoms, or an alkenyl group.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 9, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsushige Kamada, Kazuaki Yoshida
  • Patent number: 5250397
    Abstract: A method for processing a silver halide color photographic material is disclosed, which comprises: color developing a silver halide color photographic material with a color developer containing an aromatic primary amine color developing agent, followed by processing with a processing solution having a bleaching ability, wherein the replenishment rate of said color developer is in the range of 600 ml or less per m.sup.2 of the photographic material, and wherein said silver halide color photographic material contains at least one yellow colored cyan coupler.
    Type: Grant
    Filed: April 2, 1991
    Date of Patent: October 5, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsushige Kamada, Keiji Mihayashi, Yoshihiro Fujita