Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
163 words
A gypsum cement composition adapted for use in electrical cable fire barrier operations having pseudo-plastic flow in aqueous slurry, having a dry density of about 25 to 35 pounds per cubic foot and having a dry compressive strength when set below 300 pounds per square inch, which comprises by weight: about 30 to approximately 80% calcium sulfate hemihydrate; about 10 to approximately 40% diatomaceous earth aggregate having an apparent bulk density in the range from about 5 to approximately 16 pounds per cubic foot and a water carrying capacity in the range from about 1.5 to approximately 4 times its weight of water; about 10 to approximately 30% of a second aggregate having a dry bulk density in the range from about 5 to approximately 20 pounds per cubic foot, and a water carrying capacity from about 0.7 to approximately 4 times its weight of water; and by weight based on the weight of hemihydrate about 0.05-1.25% glycerine and about 0.05-0.7% boric acid.
Claim 2
Dependent Claim
163 words
A gypsum cement composition adapted for use in electrical cable fire barrier operations having pseudo-plastic flow in aqueous slurry, having a dry density of about 25 to 35 pounds per cubic foot and having a dry compressive strength when set below 300 pounds per square inch, which comprises by weight: about 30 to approximately 80% calcium sulfate hemihydrate; about 10 to approximately 40% diatomaceous earth aggregate having an apparent bulk density in the range from about 5 to approximately 16 pounds per cubic foot and a water carrying capacity in the range from about 1.5 to approximately 4 times its weight of water; about 10 to approximately 30% of a second aggregate having a dry bulk density in the range from about 5 to approximately 20 pounds per cubic foot, and a water carrying capacity from about 0.7 to approximately 4 times its weight of water; and by weight based on the weight of hemihydrate about 0.05-1.25% glycerine and about 0.05-0.7% boric acid.
Claim 3
Dependent Claim
26 words
A composition in accordance with claim 1 having a compressive strength when set in the range from about 100 to approximately 200 pounds per square inch.
Claim 4
Dependent Claim
20 words
A composition in accordance with claim 1 having a compressive strength when set of about 140-160 pounds per square inch.
Claim 5
Dependent Claim
24 words
A composition in accordance with claim 1 in which the diatomaceous earth has a particle size of about 95% passing 325 U.S. Standard mesh.
Claim 6
Dependent Claim
24 words
A composition in accordance with claim 1 in which the second aggregate has a particle size of about 30% passing 50 U.S. Standard mesh.
Claim 7
Dependent Claim
22 words
A composition in accordance with claim 1 in which the calcium sulfate hemihydrate has a normal consistency greater than about 80 cc.
Claim 8
Dependent Claim
38 words
A composition in accordance with claim 1 comprising about 60% calcium sulfate hemihydrate; about 20% diatomaceous earth; about 20% vermiculite; about 0.7% by weight of hemihydrate of glycerine; and about 0.07% by weight of hemihydrate of boric acid.
Claim 9
Dependent Claim
38 words
A composition in accordance with claim 1 comprising about 35% calcium sulfate hemihydrate; about 35% diatomaceous earth; about 28% perlite; about 0.7% by weight of hemihydrate of glycerine; and about 0.07% by weight of hemihydrate of boric acid.
Claim 10
Dependent Claim
14 words
A settable pseudo-plastic mass comprising an aqueous slurry of the composition of claim 1.
Claim 11
Dependent Claim
32 words
A settable mass in accordance with claim 9 for pumping application having in the range from about 120 to approximately 170 pounds of water per 100 pounds of dry gypsum cement composition.
Claim 12
Dependent Claim
32 words
A settable mass in accordance with claim 9 for trowelling application having in the range from about 100 to approximately 130 pounds of water per 100 pounds of dry gypsum cement composition.