Patents by Inventor Stephen Michael Copper

Stephen Michael Copper 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).

  • Transparent blends of polyetherimide resins
    Patent number: 5852085
    Abstract: Disclosed are transparent blends of a polyetherimide, at least one resin selected from the group consisting of polycarbonate resins, poly(ester-carbonate) resins, and polyarylate resins, and an effective amount of a catalyst to provide transparency to the blends. In addition to being transparent, the blends have good ductility as well as high flexural and tensile properties. The yellowness index of the compositions can be improved with the addition of a phosphite.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: December 22, 1998
    Assignee: General Electric Company
    Inventors: Sterling Bruce Brown, Stephen Michael Copper, Brenda A. Giles