Patents by Inventor Donald O. McCreight

Donald O. McCreight 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).

  • Silica castables
    Patent number: 4506025
    Abstract: A castable silica refractory consisting essentially of 58-78 by weight percent amorphous silica selected from the group consisting of vitreous and fused silica or a combination thereof; 10-30 by weight percent quartzite; 4-10 by weight percent volatilized silica; 2-3 by weight percent wollastonite powder; and 1-3 by weight percent white portland cement; plus as additions about 0.4 by weight percent water reducing agent and 6-10 by weight percent water.
    Type: Grant
    Filed: March 22, 1984
    Date of Patent: March 19, 1985
    Assignee: Dresser Industries, Inc.
    Inventors: Thomas R. Kleeb, George H. Criss, Donald O. McCreight
  • 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