US2812427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passive radio communication system
Assignee: F ALEXANDER
•
Filing: 1953-12-28
•
Granted: 1957-11-05
•
Expires: 1973-12-28
Abstract
No abstract record available.
Inventors
- 👤 Magondeaux Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:40
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/767; Y; Y10; Y10S; Y10S128/00; Y10S128/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1779259A
Cited
US1864543A
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US1821032A
Cited
US2461646A
Cited
US2460827A
Cited
US2539476A
Cited
US2505525A
Cited
US2511409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |