Patents by Inventor Albert S. Holbert

Albert S. Holbert 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).

  • Process for treating 9% nickel steel
    Patent number: 3969158
    Abstract: A heat treatment of nine percent nickel steel including carburizing, double normalizing, tempering, subcooling and then tempering to provide a steel having useful mechanical properties at extremely low temperatures.
    Type: Grant
    Filed: August 10, 1972
    Date of Patent: July 13, 1976
    Assignee: Youngstown Sheet and Tube Company
    Inventor: Albert S. Holbert