Patents by Inventor Katsutoshi Tao

Katsutoshi Tao 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).

  • Stable dispersible mineral acid slurry of benzidine derivatives
    Patent number: 5454973
    Abstract: Mineral acid slurries of benzidine derivatives having high stability are provided by incorporating into such slurries a polysaccharide.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: October 3, 1995
    Assignee: Wakayama Seika Kogyo Co., Ltd.
    Inventors: Fumio Koseki, Kenjiro Fujiki, Motonori Takeda, Katsutoshi Tao