US3101816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling and servicing mast
Assignee: Individual
•
Filing: 1960-05-20
•
Granted: 1963-08-27
•
Expires: 1980-05-20
Abstract
No abstract record available.
Inventors
- 👤 Charles L Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:13
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/023
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
165 words
A MOBILE, SELF-CONTAINED WELL DRILLING AND SERVICING APPARATUS COMPRISING A TRAILER, A DRILLING RIG HAVING ALL OF ITS COMPONENTS INCLUDING THE WINCH AND DRAW WORKS FIXEDLY MOUNTED ON SAID TRAILER, A DRILLING AND SERVICING MAST CARRIED BY SAID TRAILER IN A HORIZONTAL POSITION ABOVE SAID DRILLING RIG COMPONENTS, MEANS MOUNTING SAID MAST FOR SHIFTING LONGITUDINALLY OF SAID TRAILER WHILE IN A HORIZONTAL POSITION BETWEEN A RETRACTED POSITION IN WHICH THE OVER-ALL LENGTH OF THE TRAILER IS A MINIMUM AND AN ADVANCED POSITION PROJECTING BEYOND AN END OF THE TRAILER AND IN WHICH THE OVER-ALL LENGTH OF THE TRAILER IS A MAXIMUM, ERECTING MEANS OPERABLE WHEN THE MAST IS IN SAID ADVANCED POSITION FOR MOVING SAID MAST BETWEEN A HORIZONTAL POSITION AND A VERTICALLY EXTENDING ERECTED POSITION, SAID MAST HAVING AT ONE SIDE THEREOF AND PROJECTING BEYOND ITS LOWER END A PAIR OF SLOTTED LUGS, SAID TRAILER HAVING A PAIR OF APERTURED SUPPORTS COOPERATING WITH SAID LUGS WHEN SAID MAST IS IN ITS ADVANCED POSITION, REMOV-
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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) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |