Patents by Inventor Joseph Zu Sun

Joseph Zu Sun 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).

  • Heat shrinkable multi-layer film of hydrolyzed ethylene vinyl acetate and a cross-linked olefin polymer
    Patent number: 4064296
    Abstract: A heat shrinkable multi-layer packaging film having a layer of a hydrolyzed ethylene-vinyl acetate copolymer. Preferably, the film is formed by coextruding the hydrolyzed ethylene-vinyl acetate copolymer layer between two other polymeric layers, at least one of which is cross-linkable, and thereafter irradiating and orienting the multi-layer structure. The resulting film is heat shrinkable and has very low oxygen permeability.
    Type: Grant
    Filed: October 2, 1975
    Date of Patent: December 20, 1977
    Assignee: W. R. Grace & Co.
    Inventors: Norman D. Bornstein, Donald J. D'Entremont, Alan S. Weinberg, Henry G. Schirmer, Joseph Zu Sun