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US 4,874,726 AGranted
Lightweight fused silica refractory compositions
AssigneeDresser Industries, Inc.
InventorsThomas R. Kleeb, Berhl E. Wishon
Life of this patent
Estimating the term…
Abstract
A refractory composition comprising a fused silica composition comprising a silica compound and a binder and for each 100 parts by weight of said fused silica composition from about 3 to 15 parts by weight of alumina-silica based hollow microspheres.
Claims4
A refractory composition consisting essentially of a fused silica composition containing about 40 to 95 weight percent vitreous silica, up to about 25 weight percent of a calcined refractory aggregate, and the balance a calcium aluminate cement;
- and for each 100 parts by weight of said fused silica composition from about 3 to 15 parts by weight of alumina-silica based hollow microspheres.
Dependencies are inferred from the claim text.