Patent US4029390A successfully refreshed from Google Patents.
Patent US2580073A successfully refreshed from Google Patents.
US2580073A
Expired / Lapsed
US
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Time multiplex television in color
Assignee: AT&T Inc
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Filing: 1948-05-01
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Granted: 1951-12-25
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Expires: 1968-05-01
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:22
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2378746A
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US2343825A
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US2431088A
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US2455710A
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US2446248A
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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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |