Patents by Inventor Nariko Isozaki

Nariko Isozaki 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).

  • Direct positive silver halide light-sensitive photographic material
    Patent number: 4868102
    Abstract: A light-sensitive silver halide direct-positive photographic material which comprises a support and, provided thereon a light-sensitive direct-positive silver halide emulsion layer containing silver halide grains having an internal latent image and a core-shell structure comprising a core and at least one shell stratum either partly or entirely covering said core, the outermost stratum of said shell having been formed in the presence of a nitrogen-containing heterocyclic compound having a mercapto group therein.
    Type: Grant
    Filed: February 2, 1988
    Date of Patent: September 19, 1989
    Assignee: Konica Corporation
    Inventors: Keiji Ogi, Atsushi Kamitakahara, Eiichi Sakamoto, Nariko Isozaki