US2472212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of locating beacons
Assignee: Individual
•
Filing: 1945-07-09
•
Granted: 1949-06-07
•
Expires: 1965-07-09
Abstract
No abstract record available.
Inventors
- 👤 Emmett L Hudspeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:51
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/18; G; G01; G01S; G01S13/00; G01S13/74; G01S13/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1384014A
Cited
US2014688A
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US2153209A
Cited
DE668231C
Cited
US2212110A
Cited
US2272839A
Cited
US2412320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |