US2965174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Off-shore well installation and method
Assignee: Shell USA Inc
•
Filing: 1958-01-27
•
Granted: 1960-12-20
•
Expires: 1978-01-27
Abstract
No abstract record available.
Inventors
- 👤 John A Haeber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:01
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/035; E21B33/037; E21B7/00; E21B7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US843606A
Cited
US809633A
Cited
GB160865A
Cited
US2534480A
Cited
US2622404A
Cited
US2699321A
Cited
US2691272A
Cited
US2684575A
Cited
US2854215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |