US3462586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doppler navigation system
Assignee: United States Department of the Navy
•
Filing: 1966-06-27
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Granted: 1969-08-19
•
Expires: 1986-06-27
Abstract
No abstract record available.
Inventors
- 👤 Francis E J Tholey
- 👤 Robert D Marek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:02
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3296578A
Cited
US2982956A
Cited
US3021068A
Cited
US3150365A
Cited
US3246329A
Cited
US3248734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |