Patent US2808230A successfully refreshed from Google Patents.
US2808230A
Expired / Lapsed
US
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Off-shore drilling
Assignee: Superior Oil Co
•
Filing: 1955-01-17
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Granted: 1957-10-01
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Expires: 1975-01-17
Abstract
No abstract record available.
Inventors
- 👤 Robert C Mcneill
- 👤 Stratton Hal
- 👤 Aaron D Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:58
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/12; E21B7/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US631423A
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US1598439A
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US1639852A
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US1668559A
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US2026879A
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US2125762A
Cited
US2171672A
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US2262490A
Cited
US2512783A
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US2562946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |