US2797260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subscription television system
Assignee: Zenith Electronics LLC
•
Filing: 1952-01-30
•
Granted: 1957-06-25
•
Expires: 1972-01-30
Abstract
No abstract record available.
Inventors
- 👤 Erwin M Roschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:45
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/162; H04N7/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1381317A
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US1724210A
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US1657366A
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US1912983A
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US2403059A
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US2425616A
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US2513402A
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US2531528A
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US2656410A
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US2656407A
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US2545770A
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US2573349A
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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) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |