US2843656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subscription television system
Assignee: Zenith Electronics LLC
•
Filing: 1952-04-09
•
Granted: 1958-07-15
•
Expires: 1972-04-09
Abstract
No abstract record available.
Inventors
- 👤 George V Morris
- 👤 Erwin M Roschke
- 👤 Walter S Druz
- 👤 Bertrand J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:41
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)
US2405252A
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US2472774A
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US2521010A
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US2543116A
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US2510046A
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US2547598A
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US2656406A
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US2656407A
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US2545770A
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US2531974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |