US2615977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gain control circuit utilizing keyed magnetic amplifier
Assignee: RCA Corp
•
Filing: 1948-05-28
•
Granted: 1952-10-28
•
Expires: 1968-05-28
Abstract
No abstract record available.
Inventors
- 👤 George C Sziklai
- 👤 Jr Francis J Darke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:41
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/22; H04; H04N; H04N5/00; H04N5/44; H04N5/52; H04N5/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1953487A
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US2104087A
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US2164383A
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GB473512A
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US2217948A
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FR862360A
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US2259711A
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US2251929A
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US2339406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |