Patents by Inventor Tuyet T. Vuong

Tuyet T. Vuong 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).

  • Dimer for synthesis of high performance polymer matrix composites
    Patent number: 5041527
    Abstract: An improved synthesis for PMR-type polyimides, including first preparing a dimer of 5-norbornene-2,3-dicarboxylic acid, or acid ester or anhydride and 4,4'-methylenedianiline. This dimer is then reacted with the dimethyl ester of 3,3',4,4'-benzophenonetetracarboxylic acid and 4,4'-methylenedianiline. The resulting polyimide prepolymer exhibits superior physical properties and is substantially free of the undesired trimer of 5-norbornene-2,3-dicarboxylic acid, or acid ester or anhydride and 4,4'-methylenedianiline.
    Type: Grant
    Filed: May 16, 1988
    Date of Patent: August 20, 1991
    Assignee: Rohr Industries, Inc.
    Inventors: Frank J. Riel, Tuyet T. Vuong