Patents by Inventor Robert G. Griffith

Robert G. Griffith 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).

  • Work guide for pipe reeling machines and the like and process for treating the same
    Patent number: 4044582
    Abstract: A pipe reeling machine guide for guiding and burnishing an external surface of a pipe having a work contact surface of a composition consisting essentially, in percent by weight, of: 0.70-0.90 carbon, up to 1.75 manganese, 0.08 max. phosphorus, 0.08 max. sulfur, 0.5-1.75 silicon, 8-12.0 nickel, 23-27 choromium, and the balance being essentially iron with residual impurities.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: August 30, 1977
    Assignee: Youngstown Sheet and Tube Company
    Inventor: Robert G. Griffith
  • Method of producing seamless tube mill piercer mandrel
    Patent number: 3990330
    Abstract: A laminate tube structure produced by stretch reducing, in combination, a pair of tubes. The resultant tube structure is particularly adapted for use as a mandrel for supporting a piercing point of a seamless-tube mill.
    Type: Grant
    Filed: May 8, 1975
    Date of Patent: November 9, 1976
    Assignee: Youngstown Sheet and Tube Company
    Inventors: Bertrand M. Reiley, Edwin J. Muccillo, Robert G. Griffith