US2847501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subscription television system
Assignee: Zenith Electronics LLC
•
Filing: 1952-02-06
•
Granted: 1958-08-12
•
Expires: 1972-02-06
Abstract
No abstract record available.
Inventors
- 👤 Ellett Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:15
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/167; H04N7/169; H04N7/1693
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2251525A
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US2403059A
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US2402058A
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US2495727A
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US2425616A
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US2656406A
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US2656407A
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US2632799A
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US2545770A
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US2573349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |