C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
154/114
C04B 11/28 (2006.01) B32B 13/08 (2006.01) C04B 14/20 (2006.01) C04B 28/14 (2006.01)
Patent
CA 1226801
ABSTRACT OF THE DISCLOSURE A fire-retardant gypsum wallboard having, in the gypsum core, about 2% by weight of a feldspar- free muscovite, in combination with other minor additives including ? inch long glass fibers.
459621
Burkard Edward A.
Segada James J.
National Gypsum Company
Osler Hoskin & Harcourt Llp
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