Patent US4564748A successfully refreshed from Google Patents.
Patent US2940052A successfully refreshed from Google Patents.
US2940052A
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Frequency control and synchronizing circuit
Assignee: Individual
•
Filing: 1954-03-08
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Granted: 1960-06-07
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Expires: 1974-03-08
Abstract
No abstract record available.
Inventors
- 👤 Edgar W Van Winkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:15
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/12; H04N5/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2266516A
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US2441957A
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US2455265A
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US2399135A
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US2522110A
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US2467834A
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US2557038A
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US2570013A
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US2581199A
Cited
US2720584A
Cited
US2688693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |