Patent US2672505A successfully refreshed from Google Patents.
US2672505A
Expired / Lapsed
US
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Black level shift compensating amplifier
Assignee: Avco Manufacturing Corp
•
Filing: 1950-06-13
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Granted: 1954-03-16
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Expires: 1970-06-13
Abstract
No abstract record available.
Inventors
- 👤 Hans G Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:24
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2227026A
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GB505899A
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US2295059A
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US2269538A
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US2296393A
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US2356141A
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US2481045A
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US2550960A
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US2615089A
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US2559038A
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US2611029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |