Patents by Inventor Delbert D. Stewart

Delbert D. Stewart 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).

  • Diamond tool machining of materials which react with diamond
    Patent number: 5103701
    Abstract: Apparatus for the diamond machining of materials which detrimentally react with diamond cutting tools in which the cutting tool and the workpiece are chilled to very low temperatures. This chilling halts or retards the chemical reaction between the workpiece and the diamond cutting tool so that wear rates of the diamond tool on previously detrimental materials are comparable with the diamond turning of materials which do not react with diamond.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: April 14, 1992
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Ralph L. Lundin, Delbert D. Stewart, Christopher J. Evans