US2694142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal-to-noise energy detection unit
Assignee: AT&T Inc
•
Filing: 1949-11-10
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Granted: 1954-11-09
•
Expires: 1969-11-10
Abstract
No abstract record available.
Inventors
- 👤 John F Laidig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:35
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2239901A
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US2098286A
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US2144224A
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US2261951A
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US2269011A
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US2311696A
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US2504341A
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US2586190A
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US2588031A
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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) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |