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US 4,303,446 AGranted
Fiberizable glass
AssigneeBorg-Warner Corporation
InventorsWilliam C. LaCourse, Terence J. Clark
Life of this patent
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Abstract
A lead-free, fiberizable glass composition. The glass is characterized by a relatively low hardness rating and is accordingly useful in preparing friction surfaces. Its composition includes, on a weight basis, from about 45% to about 75% of silicon dioxide, from about 15% to about 30% of potassium oxide and from about 2% to about 10% of magnesium oxide.
Claims3
A fibrous, lead-free glass having low hardness properties consisting essentially, on a weight basis, of from about 45% to about 75% of silicon dioxide, from about 15% to about 30% of potassium oxide and from about 2% to about 10% of magnesium oxide.
Dependencies are inferred from the claim text.