US3391749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for drilling straight wells
Assignee: Land and Marine Rental Co
•
Filing: 1966-06-06
•
Granted: 1968-07-09
•
Expires: 1986-06-06
Abstract
No abstract record available.
Inventors
- 👤 James F Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:52
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1690684A
Cited
US1954166A
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US2058327A
Cited
US2186725A
Cited
US2329597A
Cited
US2841366A
Cited
US3001829A
Cited
US3160218A
Cited
US3277972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |