Patents by Inventor Hakubun Ohashi

Hakubun Ohashi 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: 5376522
    Abstract: A silver halide photographic material having photographic constituent layers on a support, which photographic material is characterized in that at least one of said photographic constituent layers is a silver halide emulsion layer, at least 50% in number of the light-sensitive silver halide grains in said silver halide emulsion layer being grains that contain at least 60 mol % of silver bromide, and at least one of said photographic constituent layers containing at least one of the compounds represented by the following general formula (I):[HlAu.sub.m (L).sub.n (X).sub.p ].sub.q (I)where L is a 1igand in a 5- or 6-membered hetero ring; X is an anionic group; l is an integer of 0-2; m is an integer of 1 or 2; n is an integer of 1-3; p is an integer of 0-3; and q is an integer of 1-4.
    Type: Grant
    Filed: August 24, 1993
    Date of Patent: December 27, 1994
    Assignee: Konica Corporation
    Inventors: Hideki Takiguchi, Tomoyuki Nakayama, Nobuaki Kagawa, Hakubun Ohashi
  • Patent number: 5071738
    Abstract: The present invention relates to a silver halide photographic material that has at least one photographic constituent layer on a support, which photographic material is characterized in that said at least one photographic constituent layer contains a dispersion obtained by emulsifying and dispersing at least one hydrophobic, photographically useful material and at least one polymer compound that is water-insoluble but soluble in organic solvents and which has a phenolic hydroxyl group.
    Type: Grant
    Filed: February 15, 1990
    Date of Patent: December 10, 1991
    Assignee: Konica Corporation
    Inventors: Noboru Mizukura, Hakubun Ohashi, Shuichi Sugita