Patents by Inventor W. Wilson Cheung

W. Wilson Cheung 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).

  • Coextruded medical grade port tubing
    Patent number: 5439454
    Abstract: The present invention provides an improved coextruded medical port tubing. The medical port tubing provides characteristics that are desirable in the medical industry and therefore can be used as a medical port tubing in, for example, renal therapy or blood donor tubes. To this end, the present invention provides a coextruded medical grade port tubing comprising: an outer layer comprising a blend of polypropylene copolymer and styrene-ethylene-butylene-styrene copolymer; a tie layer; and a core layer comprising polyvinyl chloride.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: August 8, 1995
    Assignee: Baxter International Inc.
    Inventors: Ying-Cheng Lo, Indrajit T. Patel, Lecon Woo, W. Wilson Cheung, Michael T. K. Ling