Patents by Inventor John J. Grenawalt

John J. Grenawalt 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).

  • Ultra-high strength low alloy titanium bearing flat rolled steel and process for making
    Patent number: 4082576
    Abstract: A high strength low alloy titanium, cold reduced flat rolled steel product with yield strengths in excess of 120 and as high as at least 180 ksi and process for producing the same.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: April 4, 1978
    Assignee: Youngstown Sheet and Tube Company
    Inventors: Peter B. Lake, John J. Grenawalt, Ronald L. Pastorek
  • Process for producing rimmed enameling steel
    Patent number: 3939013
    Abstract: A cold-rolled rimmed steel composition including vanadium and nitrogen, and process for producing the same with a preferred grain structure, which steel is particularly adapted for one-coat vitreous enameling.
    Type: Grant
    Filed: June 6, 1973
    Date of Patent: February 17, 1976
    Assignee: Youngstown Sheet and Tube Company
    Inventors: Larry E. Gardner, John J. Grenawalt, Adolph John Birkle