Patent US2642491A successfully refreshed from Google Patents.
US2642491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television receiver
Assignee: Zenith Electronics LLC
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Filing: 1950-01-27
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Granted: 1953-06-16
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Expires: 1970-01-27
Abstract
No abstract record available.
Inventors
- 👤 Iii Albert Cotsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:57
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/60; H04N5/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1660930A
Cited
US1908381A
Cited
US2115825A
Cited
FR872431A
Cited
US2505843A
Cited
US2498488A
Cited
US2504662A
Cited
US2528222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |