Patents by Inventor Martin D. Stuart

Martin D. Stuart 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).

  • High-strength magnesia partially stabilized zirconia
    Patent number: 6723672
    Abstract: A high strength ceramic body and a method of making same are disclosed. The ceramic body is formed of ceramic composition containing 2.8-5.0% by weight MgO, an effective amount of grain growth inhibiting material, and the balance being essentially zirconia. The crystalline microstructure of the ceramic body comprises grains of cubic zirconia having an average grain size of less than about 30 microns in major dimension, 0.1-8.7% by volume of discrete particles of the grain growth inhibiting material, and precipitates of tetragonal zirconia having a substantially ellipsoidal shape with a long dimension of about 0.1-0.4 microns.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: April 20, 2004
    Assignee: Carpenter Advanced Ceramics, Inc.
    Inventors: Martin D. Stuart, Wilson H. Ta