US2509230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beacon system
Assignee: STC PLC
•
Filing: 1946-02-28
•
Granted: 1950-05-30
•
Expires: 1966-02-28
Abstract
No abstract record available.
Inventors
- 👤 Himmel Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:23
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1379541A
Cited
US2194548A
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US2206644A
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US2253958A
Cited
US2311837A
Cited
US2402410A
Cited
US2420605A
Cited
US2412986A
Cited
US2444439A
Cited
US2444431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |