Patents by Inventor Hiroyuki Habu

Hiroyuki Habu 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).

  • Processing agent for silver halide color photosensitive material and processing method thereof
    Patent number: 6905813
    Abstract: Processing with adding either of the following compounds (a), (b) and (c) to a bleaching and fixing processing solution is performed. (a) at least one selected from a group having a structure represented by a general formula [I] as described below; (b) at least one of an aminopyridine-type compound with acid dissociation constant (pKa) thereof is in the range of 5.5 to 8.5; (c) at least one of a polyethyleneimines having a structure represented by the following general formula [II].
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: June 14, 2005
    Assignee: Chugai Photo Chemical Co., Ltd.
    Inventor: Hiroyuki Habu
  • Processing agent for silver halide color photosensitive material and processing method thereof
    Publication number: 20030157444
    Abstract: Processing with adding either of the following compounds (a), (b) and (c) to a bleaching and fixing processing solution is performed.
    Type: Application
    Filed: August 27, 2002
    Publication date: August 21, 2003
    Inventor: Hiroyuki Habu