Patents by Inventor Shigtetoshi Hiraishi

Shigtetoshi Hiraishi 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).

  • Heat sensitive recording material
    Patent number: 5098881
    Abstract: The present invention provides a heat sensitive recording material which comprises an aromatic isocyanate compound, an imino compound which reacts with said aromatic isocyanate compound upon application of heat to form a color and a metallic soap which is pulverized together with said imino compound. Preferably the metallic soap has an average particle diameter of 0.5-2.0 .mu.m. This heat sensitive material is excellent in sensitivity and can form an image or excellent stability.
    Type: Grant
    Filed: June 13, 1991
    Date of Patent: March 24, 1992
    Assignee: Mitsubishi Paper Mills Ltd.
    Inventors: Shigtetoshi Hiraishi, Susumu Yamanobe