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US2617985A
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Frequency control system
Assignee: Collins Radio Co
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Filing: 1950-02-23
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Granted: 1952-11-11
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Expires: 1970-02-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:16
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2011953A
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US2311522A
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US2452601A
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US2474278A
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US2543058A
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US2476840A
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US2568412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |