Patent US3501583A successfully refreshed from Google Patents.
US3501583A
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US
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Apparatus for correcting vertical drift in color television index tube
Assignee: National Video Corp
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Filing: 1966-11-16
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Granted: 1970-03-17
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Expires: 1986-11-16
Abstract
No abstract record available.
Inventors
- 👤 James W Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:59
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/22; H04N9/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2587074A
Cited
US2577368A
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US2798900A
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US2934600A
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US2840635A
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US2792521A
Cited
US3041391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |