US3394081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic quartz growth using lithium ions in the nutrient solution
Assignee: AT&T Inc
•
Filing: 1967-04-20
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Granted: 1968-07-23
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Expires: 1987-04-20
Abstract
No abstract record available.
Inventors
- 👤 Albert A Ballman
- 👤 James C King
- 👤 Robert A Laudise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:55
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2638408A
Cited
US2675303A
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US2680677A
Cited
US2785058A
Cited
US2871192A
Cited
US2944027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |