Patents by Inventor Wei H. Chang

Wei H. Chang 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).

  • Metallized film structure and its production
    Patent number: 5731093
    Abstract: A metallized film combination of an oriented polymeric substrate layer having on one surface thereof a coating of a blend of (a) a vinyl alcohol homopolymer or copolymer and (b) a vinylidene chloride copolymer, the coating blend having a metal layer thereon. The method involves coating the substrate after the substrate has been machine direction oriented and before the combination is transverse direction oriented followed by TD orientation and finally by depositing a metal layer on the blend surface.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: March 24, 1998
    Assignee: Mobil Oil Corporation
    Inventors: Wei H. Chang, Shaw-Chang Chu, James A. Johnson, Jr.