Patent US2748385A successfully refreshed from Google Patents.
US2748385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio navigation aids for aircraft
Assignee: Marconis Wireless Telegraph Co Ltd
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Filing: 1951-03-12
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Granted: 1956-05-29
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Expires: 1971-03-12
Abstract
No abstract record available.
Inventors
- 👤 Rust Noel Meyer
- 👤 Cockerell Christopher Sydney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:28
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1562485A
Cited
US2148267A
Cited
US2144203A
Cited
US2198113A
Cited
US2439663A
Cited
US2513320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |