US3538238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible guide pipe for underwater drilling
Assignee: IFP Energies nouvelles
•
Filing: 1968-06-28
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Granted: 1970-11-03
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Expires: 1988-06-28
Abstract
No abstract record available.
Inventors
- 👤 Jacques Delacour
- 👤 Remi Reynard
- 👤 Michel Chatard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:21
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/01; E21B7/00; E21B7/12; E21B7/128; F; F16; F16L; F16L11/00; F16L11/14; F16L11/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US330910A
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US973901A
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US1023032A
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US1198392A
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US1365306A
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US2028793A
Cited
US2409530A
Cited
US2402503A
Cited
US2438146A
Cited
GB1069274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |