Patents by Inventor Steven P. Gruver

Steven P. Gruver 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).

  • Magnesia spinel refractory brick
    Patent number: 6261983
    Abstract: The present invention discloses novel magnesia-spinel refractory compositions and bricks formed thereof that exhibit longer lining life, greater hot strength and reduced tendency to spall under high thermal loading conditions. The invention is designed to slow or retard the reaction between spinel and lime through the addition of zirconia in the form of an alumina-zirconia grain to the refractory mix. Zirconia reacts more readily with the lime in the refractory composition and surrounding environment to form calcium zirconate.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: July 17, 2001
    Assignee: Baker Refractories
    Inventor: Steven P. Gruver