Patent US2525103A successfully refreshed from Google Patents.
US2525103A
Expired / Lapsed
US
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Apparatus for controlling black level shift in television signals
Assignee: RCA Corp
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Filing: 1948-03-11
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Granted: 1950-10-10
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Expires: 1968-03-11
Abstract
No abstract record available.
Inventors
- 👤 Noah E Sprecher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:59
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/16; H04N5/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2307387A
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US2254204A
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US2203634A
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FR845897A
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FR847676A
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US2240600A
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US2240601A
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US2254114A
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US2295410A
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US2288434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |