US3302709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for attaching and detaching a working base to an underwater well base
Assignee: Chevron USA Inc
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Filing: 1965-06-03
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Granted: 1967-02-07
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Expires: 1985-06-03
Abstract
No abstract record available.
Inventors
- 👤 William R Postlewaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:13
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/01; E21B43/013; E21B33/00; E21B33/02; E21B33/03; E21B33/035; E21B41/00; E21B41/08; E21B41/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
28 words
A METHOD OF ATTACHING AND DETACHING A WORKING BASE AND THE FLEXIBLE GUIDELINES ATTACHED THERETO TO A PERMANENT BASE OF A SUBSEA WELL SITE FROM AN OPERATIONAL BASE
References Cited (Backward Citations)
US3096999A
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US3021909A
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US3050140A
Cited
US3062287A
Cited
US3137348A
Cited
US3186487A
Cited
US3166123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |