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US3493674A
Expired / Lapsed
US
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Television message system for transmitting auxiliary information during the vertical blanking interval of each television field
Assignee: RCA Corp
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Filing: 1966-05-18
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Granted: 1970-02-03
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Expires: 1986-05-18
Abstract
No abstract record available.
Inventors
- 👤 William D Houghton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:36
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00095; H04N1/00098; H04N7/00; H04N7/08; H04N7/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2502213A
Cited
US2686220A
Cited
US2874213A
Cited
US3046331A
Cited
US3188650A
Cited
US3070655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |