Patent US2561087A successfully refreshed from Google Patents.
US2561087A
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US
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Frequency modulation-amplitude modulation receiver circuits
Assignee: RCA Corp
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Filing: 1945-12-04
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Granted: 1951-07-17
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Expires: 1965-12-04
Abstract
No abstract record available.
Inventors
- 👤 Earl I Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:59
CPC Classifications
H; H03; H03D; H03D5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1850831A
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US1819299A
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US2005772A
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US1930691A
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US1961720A
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US1943790A
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FR799927A
Cited
US2106229A
Cited
US2097359A
Cited
US2475032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |