Patents by Inventor Keijiro Kato

Keijiro Kato 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).

  • Antitumor agent
    Patent number: 4678773
    Abstract: An antitumor agent of the present invention comprises, as an effective ingredient, lipoteichoic acid which is extracted from gram-positive bacterial cells.
    Type: Grant
    Filed: August 16, 1984
    Date of Patent: July 7, 1987
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hiroko Usami, Akihiro Yamamoto, Yutaka Sugawara, Shozo Kotani, Keijiro Kato