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US3560060A
Expired / Lapsed
US
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Rod guide and centralizer
Assignee: Individual
•
Filing: 1968-12-18
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Granted: 1971-02-02
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Expires: 1988-12-18
Abstract
Abstract A POLYURETHANE ROD GUIDE AND CENTRALIZER FOR USE ON SUCKER RODS EXTENDING LONGITUDINALLY THROUGH PRODUCTION TUBING SUCH AS US USED IN PUMPING FLUIDS TO THE SURFACE IN OIL WELLS WHEREIN THE ROD GUIDE AND CENTRALIZER SURROUND THE ROD TO POSITION IT GENERALLY AXIALLY OF THE TUBING TO PREVENT ENGAGEMENT OF THE ROD WITH THE TUBING WHEN SUCH RODS ARE RECIPROCATED THEREIN FOR ACTUATING AS WELL PUMP CONNECTED TO THE SUCKER RODS.
Inventors
- 👤 Nate Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:05
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1071
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |