US3370656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for submarine core drilling
Assignee: IFP Energies nouvelles
•
Filing: 1965-11-29
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Granted: 1968-02-27
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Expires: 1985-11-29
Abstract
No abstract record available.
Inventors
- 👤 Grolet Pierre
- 👤 Moulin Pierre
- 👤 Parola Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:44
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/12; E21B7/124; E21B19/00; E21B19/22; E21B25/00; E21B25/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3125171A
Cited
US2013070A
Cited
US2548616A
Cited
US2665885A
Cited
US2807439A
Cited
US3304708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |