Patents by Inventor Tadashi Ohmatsu

Tadashi Ohmatsu 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).

  • Dye-forming method, color developing compositions, photosensitive materials and color developing agent precursors
    Patent number: 6545157
    Abstract: A dye-forming method comprising: reacting a dye-forming coupler and a color developing agent precursor represented by the following general formula (I): wherein A3 represents a group other than a hydrogen atom which leaves, accompanied by the bonding electron pair with the nitrogen atom in general formula (I), to thereby form a color developing agent; A2 represents a group which leaves in association with a dye-formation; and A1 represents a group which forms a dye together with the nitrogen atom and the coupler.
    Type: Grant
    Filed: November 14, 2001
    Date of Patent: April 8, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kensuke Morita, Shun-ichi Ishikawa, Hideaki Naruse, Koki Nakamura, Toshio Kawagishi, Tadashi Ohmatsu, Kozo Aoki
  • DYE-FORMING METHOD, COLOR DEVELOPING COMPOSITIONS, PHOTOSENSITIVE MATERIALS AND COLOR DEVELOPING AGENT PRECURSORS
    Publication number: 20030054281
    Abstract: A dye-forming method comprising: reacting a dye-forming coupler and a color developing agent precursor represented by the following general formula (I): 1
    Type: Application
    Filed: November 14, 2001
    Publication date: March 20, 2003
    Inventors: Kensuke Morita, Shun-ichi Ishikawa, Hideaki Naruse, Koki Nakamura, Toshio Kawagishi, Tadashi Ohmatsu, Kozo Aoki
  • Dye-forming method, color developing compositions, photosensitive materials and color developing agent precursors
    Patent number: 6372416
    Abstract: A dye-forming method comprising: reacting a dye-forming coupler and a color developing agent precursor represented by the following general formula (I): wherein A3 represents a group other than a hydrogen atom which leaves, accompanied by the bonding electron pair with the nitrogen atom in general formula (I), to thereby form a color developing agent; A2 represents a group which leaves in association with a dye-formation; and A1 represents a group which forms a dye together with the nitrogen atom and the coupler.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: April 16, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kensuke Morita, Shun-ichi Ishikawa, Hideaki Naruse, Koki Nakamura, Toshio Kawagishi, Tadashi Ohmatsu, Kozo Aoki