Patents by Inventor Eiich Okutsu

Eiich Okutsu 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).

  • Developing method
    Patent number: 4569904
    Abstract: A method for developing an exposed negative silver halide photographic light-sensitive material is described, in the presence of a hydrazind derivative, comprising treating the material with a developer containing at least components (a) a developing agent, (b) not less than 0.25 mol/liter of a sulfite, and (c) not less than 0.1 mol/liter of a compound having an acid dissociation constant of from 1.times.10.sup.-11 to 3.times.10.sup.-13, and having a pH value of from 10.5 to 12.3.
    Type: Grant
    Filed: October 23, 1984
    Date of Patent: February 11, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Eiich Okutsu, Kazumi Watase, Yoshio Inagaki, Shigeo Hirano