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US 4,391,917 AGranted
Alumino-silicate refractory brick
AssigneeDresser Industries, Inc.
InventorsDavid J. Michael, Berhl E. Wishon
Life of this patent
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Abstract
Carbonaceous bonded refractory shapes in which the predominant refractory aggregate is andalusite, being characterized by the absence of substantial shrinkage after coking at 2000.degree. F.
Claims7
Carbonaceous bonded refractory shapes comprising from about 1 to 35%, by weight, carbon and the balance a non-basic refractory aggregate, said refractory aggregate comprising at least about 75%, by weight, andalusite, said refractory shapes being characterized by the absence of substantial shrinkage after coking at 2000.degree. F., and the absence of mullite.
Dependencies are inferred from the claim text.