Patent US2638538A successfully refreshed from Google Patents.
US2638538A
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Automatic gain control system
Assignee: RCA Corp
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Filing: 1949-05-27
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Granted: 1953-05-12
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Expires: 1969-05-27
Abstract
No abstract record available.
Inventors
- 👤 Ruben Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:39
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2241553A
Cited
GB380445A
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US1889018A
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FR759727A
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US2018982A
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US2153747A
Cited
FR43779E
Cited
US2171657A
Cited
US2103637A
Cited
US2200049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |