Patents by Inventor Thomas Troczynski

Thomas Troczynski 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).

  • Surface strengthened composite ceramic material
    Patent number: 5047374
    Abstract: A surface-strengthened composite ceramic material has a ceramic matrix and a refractory phase dispersed at least in and close to the surface of the matrix. The refractory phase includes beta-alumina particles in which larger cations producing a larger molar volume replace sufficient smaller cations in beta-alumina particles in and close to the surface of the composite ceramic material to cause compressive surface stresses which increase the surface strength of the composite ceramic material. The smaller cations are replaced by the larger cations after firing of the composite ceramic material.
    Type: Grant
    Filed: April 27, 1988
    Date of Patent: September 10, 1991
    Assignee: McMaster University
    Inventors: Patrick S. Nicholson, Fred F. Lange, Thomas Troczynski