Patents by Inventor Stephen Sitko

Stephen Sitko 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).

  • Strain tolerant ceramic coating
    Patent number: 5993976
    Abstract: A strain tolerant ceramic coating, preferably for use as an abrasive coating on a substrate is provided. The coating is prepared from a yttria and zirconia powder having an average particle size less than 40 microns. The coating is formed by depositing the powder on the substrate by a plasma spray process. The as-applied coating contains essentially no macrocracks, but a post-stressed coating contains a random distribution, population, and orientation of microcracks and macrocracks.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: November 30, 1999
    Assignee: Sermatech International Inc.
    Inventors: Purusottam Sahoo, Stephen Sitko