US3353606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polished rod protector
Assignee: Individual
•
Filing: 1965-08-06
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Granted: 1967-11-21
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Expires: 1985-08-06
Abstract
No abstract record available.
Inventors
- 👤 Robert K Dyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:27
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN COMBINATION WITH A WELL INCLUDING A STRING OF WELL TUBING, A STUFFING BOX CONNECTED THEREWITH AND A POLISHED ROD EXTENDING THROUGH SAID STUFFING BOX, AN EXTENSIBLE CLOSURE AROUND SAID POLISHED ROD BELOW SAID STUFFING BOX, THE UPPER END OF SAID CLOSURE BEING RADIALLY SECURED RELATIVE TO SAID STUFFING BOX AND THE LOWER END OF SAID CLOSURE BEING SECURED TO MOVE RELATIVE TO THE MOVEMENT OF SAID POLISHED ROD, A SURGE TANK, MEANS COMMUNICATING THE INTERIOR OF SAID SURGE TANK WITH THE INTERIOR OF SAID CLOSURE, MEANS CONNECTING THE INTERIOR OF SAID TUBING WITH SAID SURGE TANK ABOVE THE LAST SAID MEANS, A FLUID LUBRICANT WITHIN SAID CLOSURE, AND WHEREIN SAID MEANS CONNECTING THE INTERIOR OF SAID CLOSURE WITH THE INTERIOR OF SAID URGE TANK INCLUDES A BLADDER IN THE LATTER.
Claim 2
Dependent Claim
131 words
IN COMBINATION WITH A WELL INCLUDING A STRING OF WELL TUBING, A STUFFING BOX CONNECTED THEREWITH AND A POLISHED ROD EXTENDING THROUGH SAID STUFFING BOX, AN EXTENSIBLE CLOSURE AROUND SAID POLISHED ROD BELOW SAID STUFFING BOX, THE UPPER END OF SAID CLOSURE BEING RADIALLY SECURED RELATIVE TO SAID STUFFING BOX AND THE LOWER END OF SAID CLOSURE BEING SECURED TO MOVE RELATIVE TO THE MOVEMENT OF SAID POLISHED ROD, A SURGE TANK, MEANS COMMUNICATING THE INTERIOR OF SAID SURGE TANK WITH THE INTERIOR OF SAID CLOSURE, MEANS CONNECTING THE INTERIOR OF SAID TUBING WITH SAID SURGE TANK ABOVE THE LAST SAID MEANS, A FLUID LUBRICANT WITHIN SAID CLOSURE, AND WHEREIN SAID MEANS CONNECTING THE INTERIOR OF SAID CLOSURE WITH THE INTERIOR OF SAID URGE TANK INCLUDES A BLADDER IN THE LATTER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |