Patents by Inventor Hiroyoshi Tarumoto

Hiroyoshi Tarumoto 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).

  • Color-forming recording material
    Patent number: 5210065
    Abstract: A color-forming recording material containing:(a) an aromatic diamine,(b) an oxidizing agent such as a quinoid type electron-accepting compound, and(c) an acidic substance such as an aromatic carboxylic acid.
    Type: Grant
    Filed: October 2, 1991
    Date of Patent: May 11, 1993
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Michio Tanaka, Koji Kawai, Hiroyoshi Tarumoto, Hisaya Miki, Keiki Kishikawa, Masato Kawamura, Masatoshi Nitabaru, Terunori Fujita