Patent US2501368A successfully refreshed from Google Patents.
US2501368A
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Frequency stabilized relay for frequency-modulated oscillations
Assignee: EMI Ltd
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Filing: 1945-03-03
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Granted: 1950-03-21
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Expires: 1965-03-03
Abstract
No abstract record available.
Inventors
- 👤 White Eric Lawrence Casling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:43
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/04; H04N7/045; H03; H03C; H03C3/00; H03C3/02; H03C3/09; H03J; H03J7/00; H03J7/02; H03J7/04; H04B; H04B14/00; H04B14/002; H04B14/006; H04N5/00; H04N5/44; H04N5/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |