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US2847567A
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Automatic frequency control circuit
Assignee: Hoffman Electronics Corp
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Filing: 1955-06-10
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Granted: 1958-08-12
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Expires: 1975-06-10
Abstract
No abstract record available.
Inventors
- 👤 Lance R Jacobsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:14
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2123716A
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US2129085A
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US2172456A
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US2483315A
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US2501883A
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US2567286A
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US2685039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |