US3054873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-contact switch
Assignee: AT&T Inc
•
Filing: 1959-11-27
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Granted: 1962-09-18
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Expires: 1979-11-27
Abstract
No abstract record available.
Inventors
- 👤 William D O'brien
- 👤 Jr Charles E Pollard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:24
CPC Classifications
C; C01; C01G; C01G99/00; C01G99/006; C01G56/00; C01G56/001; C22; C22B; C22B60/00; C22B60/02; C22B60/04; G; G21; G21C; G21C19/00; G21C19/42; G21C19/44; G21C19/46; H; H01; H01H; H01H1/00; H01H1/06; H01H1/08; H01H51/00; H01H51/28; H01H51/287; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y02W; Y02W30/00; Y02W30/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2914634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |