US3045767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for directional drilling of wells
Assignee: Individual
•
Filing: 1958-11-28
•
Granted: 1962-07-24
•
Expires: 1978-11-28
Abstract
No abstract record available.
Inventors
- 👤 Willis G Klassen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:25
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06; E21B7/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2120670A
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US2061316A
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US2327658A
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US2316409A
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US2711879A
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US2915286A
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US2745635A
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US2712434A
Cited
US2805840A
Cited
US2829864A
Cited
US2819040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |