Patents by Inventor Sun D. Tong

Sun D. Tong 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).

  • Ionic heparin coating
    Patent number: 4871357
    Abstract: A non thrombogenic quarternary ammonium/heparin complex coating for a medical article is disclosed where the organic cationic salt is an alkylbenzyldimethyl ammonium ion present in an amount of at least 50% by weight and having the following formula: ##STR1## where R is a uniform alkyl group containing between 16 to 18 carbon atoms.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: October 3, 1989
    Assignee: Baxter International Inc.
    Inventors: Li-Chien Hsu, Sun D. Tong