US2659081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple channel radio system
Assignee: Individual
•
Filing: 1945-12-10
•
Granted: 1953-11-10
•
Expires: 1965-12-10
Abstract
No abstract record available.
Inventors
- 👤 Richard C Allen
- 👤 Millman Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:40
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/34; G01S7/292; G01S7/2921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1924174A
Cited
US2189317A
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US2400641A
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US2440289A
Cited
US2447057A
Cited
US2493774A
Cited
US2403562A
Cited
US2464353A
Cited
US2403984A
Cited
US2532566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |