Patents by Inventor Thomas W. Hovatter

Thomas W. Hovatter 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).

  • Tri or tetraesters of aliphatic monocarboxylic acids of 6 to 9 carbon atoms and pentaerythritol as mold releases for aromatic polycarbonates
    Patent number: 5210124
    Abstract: A composition comprising an aromatic polycarbonate in admixture with a mold release effective amount of an ester of an aliphatic carboxylic acid of 6 to about 9 carbon atoms and a trihydric or tetrahydric alcohol.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: May 11, 1993
    Assignee: General Electric Company
    Inventors: Thomas W. Hovatter, Christianus A. A. Claesen, Hermanus B. Savenije
  • Aryl ester-grafted polyphenylene ethers and phenylene ether-amide graft copolymers prepared therefrom
    Patent number: 4808674
    Abstract: Aryl ester-grafter polyphenylene ethers are prepared by heating a polyphenylene ether with an olefinic aryl ester, usually an unsubstituted or substituted phenyl acrylate. The products react with lactams such as .epsilon.-caprolactam in the presence of lactam polymerization catalysts to produce phenylene ether-amide copolymers.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: February 28, 1989
    Assignee: General Electric Company
    Inventors: Bruce C. Johnson, Thomas W. Hovatter, Steven T. Rice, Herbert S. Chao