Patents by Inventor Walter G. Chwala

Walter G. Chwala 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).

  • Gamma radiation-resistant blend of polycarbonate with polyester
    Patent number: 5681905
    Abstract: An improved thermoplastic molding composition containing polycarbonate and a polyester copolymer based on cyclohexane-dimethanol, ethylene glycol and phthalic acid is disclosed. Improved resistance to gamma-radiation results from the incorporation of a siloxane compound which contains an oxirane group.
    Type: Grant
    Filed: August 16, 1996
    Date of Patent: October 28, 1997
    Assignee: Bayer Corporation
    Inventors: James P. Mason, Sivaram Krishnan, Walter G. Chwala