Patent US2669712A successfully refreshed from Google Patents.
US2669712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual channel receiver
Assignee: Individual
•
Filing: 1951-02-27
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Granted: 1954-02-16
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Expires: 1971-02-27
Abstract
No abstract record available.
Inventors
- 👤 Wayne S Rial
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:43
CPC Classifications
H; H04; H04J; H04J1/00; H04J1/02; H04J1/08; H04J1/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1951524A
Cited
US2092442A
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US2534233A
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US2295383A
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US2460900A
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US2419984A
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US2427191A
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US2448336A
Cited
US2491387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |