Patents by Inventor Naoki Asakawa

Naoki Asakawa 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).

  • Composition containing tissue plasminogen activator
    Patent number: 4837022
    Abstract: A composition containing a tissue Plasminogen Activator (tPA) which comprises a partial hydrolyzate of gelatin cross-linked to a diisocyanate as an essential ingredient; or alternatively a partial hydrolyzate of gelatin cross-linked to a diisocyanate and one or more of a basic amino acid or salt thereof. The composition enhances the solubility of the tPA in water, thereby making the tPA further available in the treatment of circulatory diseases caused by thrombi.
    Type: Grant
    Filed: September 10, 1986
    Date of Patent: June 6, 1989
    Assignee: Eisai Co., Ltd.
    Inventors: Fumio Kakimoto, Naoki Asakawa, Yasuo Ishibashi, Yasuo Miyake