Patents by Inventor Robert Andrew Herold

Robert Andrew Herold 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).

  • Graphite forging die
    Patent number: 3987658
    Abstract: Graphite having a compressive strength at room temperature of at least 10,000 psi is an improved die material useful in the forging of high strength alloys which are in a temporary condition of low strength and high ductility in hot die means.
    Type: Grant
    Filed: December 12, 1975
    Date of Patent: October 26, 1976
    Assignee: United Technologies Corporation
    Inventor: Robert Andrew Herold