Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Reexamination Certificate
2006-04-04
2006-04-04
Group, Karl (Department: 1755)
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
C501S035000, C501S036000, C501S070000
Reexamination Certificate
active
07022634
ABSTRACT:
Provided is a glass composition useful in preparing fiberglass, with the composition comprising SiO2in an amount ranging from 52-62 weight percent: B2O3in an amount ranging from 3.5-5.5 weight percent; CaO in an amount ranging from 18-25 weight percent; MgO in an amount ranging from 0.5-4 weight percent; Al2O3in an amount ranging from 10-15 weight percent; and Na2O in an amount ranging from 0.25-2 weight percent. The glass composition has an HTV of no greater than 2300° F. and a liquidus temperature at least 150 ° F. less than the HTV temperature. The composition allows one to realize costs savings associated with lower batch costs and abatement requirements, without significantly increasing the energy required for melting the glass, reducing fiberization efficiency, or requiring the development of new bushing technology.
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Hamilton James Patrick
Russell, III Harry Hand
Bolden Elizabeth A.
Group Karl
Johns Manville
Touslee Robert D.
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