Patent US1798565A successfully refreshed from Google Patents.
Patent US4764487A successfully refreshed from Google Patents.
US4764487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High iron glass composition
Assignee: GLASS Inc INTERNATIONAL A CA CORP
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Filing: 1985-08-05
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Granted: 1988-08-16
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Expires: 2005-08-05
Abstract
Abstract An improved glass composition, especially suitable for glass fiber manufacture having good fiberizing characteristics and good physical properties, and containing typically 40.0% to 65.0% silica, 4.0% to 11.0% aluminum oxide, 6.0% to 20.0% sodium oxide, 5.0% to 8.0% magnesium oxide and 6.0% to 17.0% calcium oxide, 4.0% to 12.0% ferric and ferrous oxide, and 0.0% to 7.0% potassium oxide.
Inventors
- 👤 Albert Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:19
CPC Classifications
C; C03; C03C; C03C1/00; C03C13/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
A batch blend to produce a glass composition useful for forming glass fibers comprising: basalt in an amount ranging from about 55 to about 95 weight percent; sand in an amount ranging from about 5 to about 22 weight percent; soda ash in an amount ranging from about 5 to about 22 weight percent; limestone in an amount ranging from about 5 to about 10 percent; pot ash in an amount less than about 9 weight percent; and zirconia in an amount less than about 10 weight percent.
Claim 2
Dependent Claim
88 words
A batch blend to produce a glass composition useful for forming glass fibers comprising: basalt in an amount ranging from about 55 to about 95 weight percent; sand in an amount ranging from about 5 to about 22 weight percent; soda ash in an amount ranging from about 5 to about 22 weight percent; limestone in an amount ranging from about 5 to about 10 percent; pot ash in an amount less than about 9 weight percent; and zirconia in an amount less than about 10 weight percent.
Claim 3
Dependent Claim
15 words
The batch blend of claim 1 wherein the resulting composition is essentially free of boron.
Claim 4
Dependent Claim
88 words
A batch blend to produce a glass composition useful for forming glass fibers comprising: basalt in an amount ranging from about 70 to about 95 weight percent; sand in an amount ranging from about 5 to about 22 weight percent; soda ash in an amount ranging from about 5 to about 22 weight percent; limestone in an amount ranging from about 5 to about 10 percent; pot ash in an amount less than about 9 weight percent; and zirconia in an amount less than about 10 weight percent.
Claim 5
Dependent Claim
88 words
A batch blend to produce a glass composition useful for forming glass fibers comprising: basalt in an amount ranging from about 70 to about 95 weight percent; sand in an amount ranging from about 5 to about 22 weight percent; soda ash in an amount ranging from about 5 to about 22 weight percent; limestone in an amount ranging from about 5 to about 10 percent; pot ash in an amount less than about 9 weight percent; and zirconia in an amount less than about 10 weight percent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |