US3817764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiberizable fluorine-free glass compositions
Assignee: Owens Corning
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Filing: 1972-06-27
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Granted: 1974-06-18
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Expires: 1992-06-27
Abstract
Abstract GLASS COMPOSITIONS ARE DISCLOSED WHICH ARE USEFUL IN MAKING TEXTILE GLASS FIBERS BY A ROTARY OR CENTRIFUGING PROCESS. THE COMPOSITIONS HAVE THE FOLLOWING RANGE OF PROPROTIONS (BY WEIGHT) : SIO2, 49 TO 57%; AL2O3, 3 TO 5%; B2O3, 6 YO 12%; NA2O, 18 TO 20%; CAO, 0 TO 2%; TIO2, 9 TO 12%; ZRO2, 0 TO 7%; LI2O, 0 TO 1% AND FE2O3, 0 TO 0.5%.
Inventors
- 👤 W Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:39
CPC Classifications
C; C03; C03C; C03C13/00; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; C03C3/093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |