Patents by Inventor James M. Puiia

James M. Puiia 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).

  • Method of making a composite body coated with CVD diamond film
    Patent number: 5912053
    Abstract: At least the surface region of a cutting tool substrate made of tungsten carbide in a cobalt matrix is carburized to chemically passivate the cobalt prior to deposition of diamond film on it. The passivation improves adhesion by preventing reaction of the cobalt with the diamond in the course of the deposition process.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: June 15, 1999
    Assignee: Saint-Gobain Norton Industrial Ceramics Corporation
    Inventors: James M. Puiia, Chow Ling Chang
  • Diamond-coated composite cutting tool and method of making
    Patent number: 5674620
    Abstract: At least the surface region of a cutting tool substrate made of tungsten carbide in a cobalt matrix is carburized to chemically passivate the cobalt prior to deposition of diamond film on it. The passivation improves adhesion by preventing reaction of the cobalt with the diamond in the course of the deposition process.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: October 7, 1997
    Assignee: Saint-Gobain/Norton Industrial Ceramics Corporation
    Inventors: James M. Puiia, Chow Ling Chang