The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1992
Filed:
May. 26, 1989
Douglas A Drake, Louisville, KY (US);
Charles N McGarry, Clarksville, IN (US);
Thomas M Wehrenberg, Jeffersonville, IN (US);
Corhart Refractories Corporation, Louisville, KY (US);
Abstract
Refractory compositions comprising at least eighty percent or more by weight Cr.sub.2 O.sub.3 densified by the addition of at least one-half percent and preferably about four percent TiO.sub.2 have about one-quarter percent to about fifteen percent by weight relatively finely divided monoclinic zirconia particles substantially uniformly dispersed therethrough to induce microcracks in the densified chromic oxide and improve thermal shock damage resistance of the refractory. Zirconia additions of up to at least five percent by weight exhibit the high glass corrosion resistance of similar densified chromic oxide compositions without zirconia.