US2852598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subscription television system
Assignee: Zenith Electronics LLC
•
Filing: 1953-07-08
•
Granted: 1958-09-16
•
Expires: 1973-07-08
Abstract
No abstract record available.
Inventors
- 👤 Erwin M Roschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:43
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)
US2472774A
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US2551068A
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US2664460A
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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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |