Patents by Inventor David R. Moyle

David R. Moyle 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).

  • Patent number: 5061661
    Abstract: A method is disclosed for producing tungsten carbide and a cemented tungsten carbide article therefrom which consists essentially of forming a uniform mixture of tungsten metal powder and carbon wherein the tungsten metal powder has an aveage particle size of from about 1 to about 4 micrometers in diameter, wherein the surface area of the carbon is no greater than about 12 m.sup.2 /g, and wherein the amount of the carbon is sufficient to react with essentially all of the tungsten to produce tungsten carbide in the subsequent heating step, heating the mixture in a non-oxidizing atmosphere at a temperature of at least about 1200.degree. C. for a sufficient time to produce tungsten carbide wherein the amount of free carbon is less than about 0.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: October 29, 1991
    Assignee: GTE Products Corporation
    Inventors: David R. Moyle, Geoffrey L. Harris, Robert F. Northrop