Patent US2090521A successfully refreshed from Google Patents.
US2760008A
Expired / Lapsed
US
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Amplifier having controllable signal expansion and compression characteristics
Assignee: RCA Corp
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Filing: 1950-08-30
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Granted: 1956-08-21
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Expires: 1970-08-30
Abstract
No abstract record available.
Inventors
- 👤 Otto H Schade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:45
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/20; H04N5/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB412126A
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US2227056A
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US2255691A
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US2299945A
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US2361634A
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US2434155A
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US2554905A
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US2549761A
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US2638538A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |