Patent US2890449A successfully refreshed from Google Patents.
US2890449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio navigation system
Assignee: TDK Micronas GmbH
•
Filing: 1953-12-02
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Granted: 1959-06-09
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Expires: 1973-12-02
Abstract
No abstract record available.
Inventors
- 👤 Sidney B Pickles
- 👤 Sven H M Dodington
- 👤 Stavis Gus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:17
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2568265A
Cited
US2480123A
Cited
US2485618A
Cited
GB615667A
Cited
US2564703A
Cited
US2565506A
Cited
US2563902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |