Patents by Inventor Hiroyuki Kaguchi

Hiroyuki Kaguchi 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: 5116716
    Abstract: Disclosed is a heat-developable color photographic material containing a compound represented by Formula (1) shown below: ##STR1## wherein X represents a halogen atom, and Y represents a group of nonmetallic atoms necessary for forming a nitrogen-containing heterocyclic ring bearing on the ring at least one substituent having 4 or more carbon atoms.Disclosed is also a process for forming an image on a heat-developable color photographic material, which comprises carrying out heat-development processing in the presence of the compound represented by Formula (1) mentioned above.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: May 26, 1992
    Assignee: Konica Corporation
    Inventors: Tawara Komamura, Masaru Iwagaki, Hiroyuki Kaguchi
  • Patent number: 4968597
    Abstract: A heat developable color photographic material is disclosed, which has a high speed and lowered fog. The photographic material comprises a blue-sensitive silver halide, a reducing agent and a binder, and a layer containing blue-sensitive silver halide contains a compound represented by the following formula I: ##STR1## wherein Z represents a group of atoms necessary for completing an aromatic ring or a heterocyclic ring which may have a condensed ring.
    Type: Grant
    Filed: November 14, 1989
    Date of Patent: November 6, 1990
    Assignee: Konica Corporation
    Inventors: Yoshihiko Suda, Hiroyuki Kaguchi, Tawara Komamura