Patents by Inventor Grady W. Clark

Grady W. Clark 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).

  • Internal zone growth method for producing metal oxide metal eutectic composites
    Patent number: 4231796
    Abstract: An improved method for preparing a cermet comprises preparing a compact having about 85 to 95 percent theoretical density from a mixture of metal and metal oxide powders from a system containing a eutectic composition, and inductively heating the compact in a radiofrequency field to cause the formation of an internal molten zone. The metal oxide particles in the powder mixture are effectively sized relative to the metal particles to permit direct inductive heating of the compact by radiofrequency from room temperature. Surface melting is prevented by external cooling or by effectively sizing the particles in the powder mixture.
    Type: Grant
    Filed: November 28, 1978
    Date of Patent: November 4, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Grady W. Clark, John D. Holder, Arvid E. Pasto