Patent US811933A successfully refreshed from Google Patents.
Patent US2675432A successfully refreshed from Google Patents.
US2675432A
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US
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Regenerative feedback circuit
Assignee: RCA Corp
•
Filing: 1950-04-04
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Granted: 1954-04-13
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Expires: 1970-04-04
Abstract
No abstract record available.
Inventors
- 👤 Pan Wen Yuan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:36
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1638; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/967
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1853178A
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US1967570A
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US2064991A
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US2068112A
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US2162878A
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US2162470A
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US2268672A
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US2452951A
Cited
US2510868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |