Patent US3617761A successfully refreshed from Google Patents.
US2686220A
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US
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Conveyeance of auxiliary information in a television system
Assignee: RCA Corp
•
Filing: 1948-05-28
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Granted: 1954-08-10
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Expires: 1968-05-28
Abstract
No abstract record available.
Inventors
- 👤 George C Sziklai
- 👤 Jr Francis J Darke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:10
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/08; H04N7/084; H04N7/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2201309A
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US2320699A
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US2299083A
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US2417446A
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US2550821A
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US2563684A
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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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |