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Patent US3400211A successfully refreshed from Google Patents.
US3400211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television standards conversion
Assignee: STC PLC
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Filing: 1964-11-16
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Granted: 1968-09-03
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Expires: 1984-11-16
Abstract
No abstract record available.
Inventors
- 👤 Peter Rainger
- 👤 Robin Evan Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:17
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0135
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |