Patents by Inventor Gregory M. Duchnak

Gregory M. Duchnak 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).

  • Fixture for performing tensile tests at extremely high temperature
    Patent number: 5286108
    Abstract: A fixture for performing tensile tests on advanced materials at extremely high temperatures (greater than 2500 degrees fahrenheit). The fixture allows gripping a specimen without introducing thermal gradient in the specimen. It incorporates a self aligning feature while avoiding thermal stress problems inherent in using different materials at elevated temperatures.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: February 15, 1994
    Assignee: Hughes Missile Systems Company
    Inventors: Walter J. Whatley, Gregory M. Duchnak