Patents by Inventor John F. Held

John F. Held 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).

  • As-hot rolled bar steel
    Patent number: 4806177
    Abstract: The toughness of vanadium and niobium microalloyed medium carbon bar steels is significantly improved by a controlled addition of aluminum in a range of from about 0.05 to 0.11 percent. Forged parts combining high strength and hardness properties with improved toughness can be made from the new bar steel without the need of heat treatment.
    Type: Grant
    Filed: July 6, 1987
    Date of Patent: February 21, 1989
    Assignee: LTV Steel Company, Inc.
    Inventors: John F. Held, Barry A. Lauer
  • High strength cold finished bars
    Patent number: 4289548
    Abstract: High strength, cold finished steel bars strengthened through the addition of from 0.05% to 0.15% vanadium and 0.001% to 0.025% nitrogen are produced by a series of steps involving hot rolling, cold drawing, and heat-treatment.
    Type: Grant
    Filed: August 19, 1977
    Date of Patent: September 15, 1981
    Assignee: Jones & Laughlin Steel Corporation
    Inventors: John H. Bucher, John F. Butler, John F. Held