Patents Assigned to Harbison-Walker Reeractories Company
  • Chromia-alumina refractory
    Patent number: 7754633
    Abstract: A refractory composition comprising at least 50 weight percent chromic oxide (Cr2O3), as measured by chemical analysis. The composition includes fused chromia-containing grain, powdered chromic oxide and sintered chromia-containing grain. The fused chromia-containing grain and the sintered chromia-containing grain comprise at least 50 weight percent chromia oxide, as measured by chemical analysis.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: July 13, 2010
    Assignee: Harbison-Walker Reeractories Company
    Inventors: H. David Prior, Howard Winkelbauer, Viktor Fischer