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Patent US3073894A successfully refreshed from Google Patents.
US3073894A
Expired / Lapsed
US
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Chrominance subcarrier phase inverter
Assignee: Compagnie Francaise de Television SA
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Filing: 1959-05-06
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Granted: 1963-01-15
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Expires: 1979-05-06
Abstract
No abstract record available.
Inventors
- 👤 France Henri Georges De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:58
CPC Classifications
H; H04; H04N; H04N11/00; H04N11/06; H04N11/18; H04N9/00; H04N9/44; H04N9/45
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
108 words
A COLOR TELEVISION SYSTEM COMPRISING: GENERATOR MEANS FOR GENERATING A SUBCARRIER WAVE, LINE FREQUENCY SIGNALS AND FIELD FREQUENCY SIGNALS; MEANS FOR SIMULTANEOUSLY TRANSMITTING A FIRST VIDEO SIGNAL, AND ONE OF TWO OTHER VIDEO SIGNALS, SAID TRANSMITTING MEANS COMPRISING A SWITCHING SYSTEM FOR ALTERNATING AT SAID LINE FREQUENCY SAID OTHER TWO VIDEO SIGNALS AND MEANS FOR MODULATING THEREBY SAID SUBCARRIER WAVE; FIRST CIRCUIT MEANS BETWEEN SAID GENERATOR MEANS AND SAID SWITCHING SYSTEM, FOR REVERSING THE OPERATION OF SAID SWITCH SYSTEM AT THE BEGINNING OF EACH FIELD ONLY DURING EQUAL SEQUENCES COMPRISING AN EVEN NUMBER OF FIELDS, SAID SEQUENCES BEING SEPARATED BY INTERVALS COMPRISING THE SAME SAID NUMBER OF FIELDS.
References Cited (Backward Citations)
US2831916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |