US3294185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automated well drilling apparatus
Assignee: Leyman Corp
•
Filing: 1963-01-22
•
Granted: 1966-12-27
•
Expires: 1983-01-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph V O'neill
- 👤 Homanick George
- 👤 Robert C Mccord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:40
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/12; E21B7/124; E21B19/00; E21B19/002; E21B19/14; E21B19/143; E21B19/15; E21B19/20; E21B43/00; E21B43/01
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
THE COMBINATION COMPRISING A VERTICALLY TRAVELING ANNULAR DRILL HEAD HAVING A PIPE GRIPPER FOR SUSPENDING A DRILL STRING WITHIN A WELL HOLE DURING A DRILLING OPERATION, AND A REMOVABLE CONNECTION BETWEEN SAID HEAD AND SAID PIPE GRIPPER FOR PERMITTING SAID PIPE GRIPPER TO
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |