US2502448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homing beacon indicator
Assignee: STC PLC
•
Filing: 1946-01-08
•
Granted: 1950-04-04
•
Expires: 1966-01-08
Abstract
No abstract record available.
Inventors
- 👤 Frum Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:34
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1379541A
Cited
US2014732A
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US1983079A
Cited
US1988006A
Cited
US1991476A
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US2257320A
Cited
US2273098A
Cited
US2387569A
Cited
US2402410A
Cited
US2404501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |