US3448305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing and utilising electrical energy for use in drilling operations
Assignee: Societe Nationale des Petroles dAquitaine SA
•
Filing: 1966-10-11
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Granted: 1969-06-03
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Expires: 1986-10-11
Abstract
No abstract record available.
Inventors
- 👤 Jean Raynal
- 👤 Serge Gstalder
- 👤 Claude Quichaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:49
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/18; H02K7/1869; H02K7/1876; E; E21; E21B; E21B41/00; E21B41/0085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB948942A
Cited
US2977573A
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US2868507A
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US2890019A
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US3074492A
Cited
US2944160A
Cited
US3058649A
Cited
US3129347A
Cited
US3105153A
Cited
US3103603A
Cited
US3149254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |