US2999549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling
Assignee: Superior Oil Co
•
Filing: 1957-09-30
•
Granted: 1961-09-12
•
Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 Stratton Hal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:24
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/14; E21B19/143; E21B15/00; E21B15/02; E21B7/00; E21B7/12; E21B7/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1377575A
Cited
US1447629A
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US1732887A
Cited
US1829304A
Cited
US2314323A
Cited
US2531930A
Cited
US2643005A
Cited
US2606003A
Cited
US2885096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |