Patents by Inventor Jack D. Knox

Jack D. Knox 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).

  • Boron-treated hard metal
    Patent number: 5116416
    Abstract: A hard, relatively non-brittle, cemented carbide body is made by sintering pressed grade carbide powders in the presence of a boron-containing material such as boron nitride. During sintering, appreciable quantities of boron migrate or diffuse into the body to become incorporated throughout the microstructure of the carbide resulting in the formation of a third quarternary phase comprised of tungsten, nickel, boron and carbon.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: May 26, 1992
    Assignee: Vermont American Corporation
    Inventors: Jack D. Knox, Donald C. Pennington, Jr.