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US2812431A
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US
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Receiver a. f. c. system using a. c. amplification and d. c. reinsertion in the feedback loop
Assignee: Zenith Electronics LLC
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Filing: 1953-12-23
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Granted: 1957-11-05
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Expires: 1973-12-23
Abstract
No abstract record available.
Inventors
- 👤 Adler Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:58
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2065565A
Cited
US2018820A
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US2104801A
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US2041855A
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US2273023A
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US2243141A
Cited
US2540333A
Cited
US2664464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |