Patent US2837897A successfully refreshed from Google Patents.
US2837897A
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Automatic underwater bracing system for a mobile drilling rig
Assignee: Gulf Oil Corp
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Filing: 1954-09-24
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Granted: 1958-06-10
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Expires: 1974-09-24
Abstract
No abstract record available.
Inventors
- 👤 Wendell H Nedderman
- 👤 Richard T Lietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:09
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/04; E02B17/08; E02B17/02; E02B17/021; E02B2017/0056; E02B2017/0073; E02B2017/0086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |