Patent US1283581A successfully refreshed from Google Patents.
Patent US2570758A successfully refreshed from Google Patents.
US2570758A
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US
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Automatic frequency control
Assignee: RCA Corp
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Filing: 1946-09-04
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Granted: 1951-10-09
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Expires: 1966-09-04
Abstract
No abstract record available.
Inventors
- 👤 Rene A Braden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:26
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/02; H03L7/04; H03J; H03J7/00; H03J7/02; H03J7/04
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) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |