Patents by Inventor Stanley R. Pavlica

Stanley R. Pavlica 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).

  • Burned high purity refractories with low soluble chromium
    Patent number: 5219807
    Abstract: A burned, high-purity refractory, specifically a chrome-alumina, alumina-chrome and picrochromite composition, which contains less than 5 ppm total soluble chromium. Such products are obtained by adding to the starting mix less than 5 wt. % (often less than 3 wt. %) zircon, titania, molybdic oxide, boric acid, carbon black, or silica.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: June 15, 1993
    Assignee: Indresco Inc.
    Inventors: Stanley R. Pavlica, Dwight S. Whittemore
  • High purity fused grain in the system Al.sub.2 O.sub.3 -Cr.sub.2 O.sub.3 -MGO
    Patent number: 5206193
    Abstract: High purity fused grain and refractory compositions that contain a high purity fused grain made up of 35 to 85 wt. % chromia, 5 to 55 wt. % alumina, and 5 to 45 wt. % magnesia. Burned refractory brick having such a chemistry was found to unexpectedly possess superior resistance to AOD and electric furnace slags.
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: April 27, 1993
    Assignee: Indresco, Inc.
    Inventors: Albert L. Renkey, Stanley R. Pavlica
  • Spall resistant chrome-alumina refractory brick
    Patent number: 4792538
    Abstract: An chrome-alumina refractory brick prepared by pressing and firing a mixture consisting essentially of about 15 to 90 percent by weight of a fused chrome-alumina grain, 5 to 25 percent by weight of chromic oxide, up to 30 percent by weight of a zirconia-containing grain, and the balance alumina.
    Type: Grant
    Filed: September 30, 1987
    Date of Patent: December 20, 1988
    Assignee: Dresser Industries, Inc.
    Inventors: Stanley R. Pavlica, Dwight S. Whittemore
  • High alumina brick
    Patent number: 4290814
    Abstract: A ceramically bonded brick made from a batch consisting essentially of fused zirconia-mullite grain or fused zirconia-alumina grain, chromic oxide, and high alumina material.
    Type: Grant
    Filed: August 17, 1979
    Date of Patent: September 22, 1981
    Assignee: Dresser Industries, Inc.
    Inventors: Stanley R. Pavlica, Donald O. McCreight