US3581404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wedge orientation device
Assignee: Western Mining Corp Ltd
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Filing: 1968-05-06
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Granted: 1971-06-01
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Expires: 1988-05-06
Abstract
Abstract A DRILL LINE WEDGE ORIENTATION DEVICE HAVING A DIRECTION SENSITIVE MEMBER AND A MEMBER MOVABLE BY PRESSURE IN THE DRILL LINE. THE DIRECTION SENSITIVE MEMBER IS SO ARRANGED THAT WHEN THE DEVICE HAS A PREDETERMINED ORIENTATION RELATIVE TO VERTICAL, THE MOVABLE MEMBER IS FREE TO MOVE IN RESPONSE TO THE PRESSURE IN THE DRILL LINE AND RESULT IN A CHANGED PARAMETER WHICH CAN BE MONITORED AT THE HEAD OF THE DRILL LINE. THE CHANGED PARAMETER CAN BE EITHER A DROP IN PRESSURE OR AN INCREASE IN THE FLUID FLOW.
Inventors
- 👤 Ronald Thomas Sanfead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:36
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/024; E21B7/00; E21B7/04; E21B7/06; E21B7/061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |