US3573078A
Expired / Lapsed
US
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Glass compositions with a high modulus of elasticity
Assignee: United States, AS REPRESENTED BY NATIONAL AERONAUTICS AND SPACE ADMINISTRATON
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Filing: 1967-11-16
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Granted: 1971-03-30
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Expires: 1987-11-16
Abstract
Abstract GLASS COMPOSITIONS COMPRISING SILICA, ALUMINA, AND MAGNESIA PLUS SUBSTANTIAL QUANTITIES OF AN UNCOMMON OXIDE SUCH AS LANTHANA, CERIA, AND YTTIRA PROVIDE A FORMULATION CONTAINING NO TOXIC ELEMENTS AND CAPABLE OF FIBERIZATION TO PRODUCE FILAMENTS HAVING A HIGH MODULUS OF ELASTICITY.
Inventors
- 👤 James F Bacon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:36
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/095; C03C13/00
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |