US3421138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sea navigational system for locating a floating installation or a submarine
Assignee: IFP Energies nouvelles
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Filing: 1966-11-01
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Granted: 1969-01-07
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Expires: 1986-11-01
Abstract
No abstract record available.
Inventors
- 👤 Pierre Moulin
- 👤 Jean Pierre Barret
- 👤 Michel La Porte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:08
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/74; G01S3/00; G01S3/80; G01S3/802; G01S3/808; G01S5/00; G01S5/18; G01S5/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |