Gypsum building product
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United States of America Patent
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-
Dec 15, 1992
Grant Date -
N/A
app pub date -
Oct 12, 1989
filing date -
Oct 12, 1989
priority date (Note) -
Expired
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Abstract
Compositions containing nonfibrous calcium sulfate in hemi-hydrate or anhydrous form and fibrous additives, including paper fibers preferably derived from waste newspaper, capable of being formed into an unfaced building material having superior mechanical properties and/or fire resistance.
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