Patent US2491808A successfully refreshed from Google Patents.
US2491808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multichannel radio and television receiver
Assignee: General Electric Co
•
Filing: 1942-08-06
•
Granted: 1949-12-20
•
Expires: 1962-08-06
Abstract
No abstract record available.
Inventors
- 👤 George W Fyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:37
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/60; H03; H03J; H03J1/00; H03J1/06; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/20
Claims Analysis
Total Claims: 0
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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) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |