Patents by Inventor Charles J. Levesque

Charles J. Levesque 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).

  • Reduced temperature sintering process
    Patent number: 3997341
    Abstract: Improved method of sintering a powder metal body at temperatures substantially lower than the normal sintering temperature of the metal. A body formed of powder metal particles is redox cycled by being repeatedly and alternately subjected to an oxidizing atmosphere and a reducing atmosphere. The number of redox cycles required to achieve sintering is inversely proportional to the temperature. The metal must be one which will undergo surface oxidation and reduction in the atmospheres and at the temperature used.
    Type: Grant
    Filed: October 17, 1974
    Date of Patent: December 14, 1976
    Assignee: Universal Oil Products Company
    Inventors: Kenneth R. Janowski, Charles J. Levesque