Patent US2938352A successfully refreshed from Google Patents.
US2938352A
Expired / Lapsed
US
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Deep water recoverable drilling platform
Assignee: Jersey Production Research Co
•
Filing: 1954-12-13
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Granted: 1960-05-31
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Expires: 1974-12-13
Abstract
No abstract record available.
Inventors
- 👤 Richard P Knapp
- 👤 Mercer H Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:30
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2675681A
Cited
US2525955A
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US2580911A
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US2482788A
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US2540878A
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US2612025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |