Patents by Inventor Cynthia P. Dogan

Cynthia P. Dogan 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).

  • Use of phosphates to reduce slag penetration in Cr2O3-based refractories
    Patent number: 6815386
    Abstract: A high-chromium refractory material that provides improved resistance to coal slag penetration is presented. The refractory mixture comprises a blend of chromium oxide, aluminum oxide and phosphates. The refractory mixture may be blended with an aggregate and cured. In addition a phosphorous oxide may be blended with chromium oxide and aluminum oxide and additionally an aggregate. The refractory mixture reduces the rate of coal slag penetration into the surface of the cured refractory.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: November 9, 2004
    Inventors: Kyei-Sing Kwong, Cynthia P. Dogan, James P. Bennett, Richard E. Chinn, Arthur V. Petty