US2940265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Offshore platform and method of erecting the same
Assignee: Shell USA Inc
•
Filing: 1956-01-30
•
Granted: 1960-06-14
•
Expires: 1976-01-30
Abstract
No abstract record available.
Inventors
- 👤 Patrick J Doody
- 👤 Benjamin L Geopfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:55
CPC Classifications
E; E02; E02B; E02B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US904156A
Cited
GB551449A
Cited
US2637978A
Cited
US2429952A
Cited
US2637172A
Cited
US2598088A
Cited
GB730835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |