US3175512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep well pump for viscous oil
Assignee: Individual
•
Filing: 1963-03-25
•
Granted: 1965-03-30
•
Expires: 1983-03-25
Abstract
No abstract record available.
Inventors
- 👤 Wayne N Sutliff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:45
CPC Classifications
F; F04; F04B; F04B47/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN A DEEP WELL PUMP, THE COMBINATION OF: A TUBLAR PUMP BARREL; A SUB CLOSING THE UPPER END OF SAID BARREL AND CONNECTING IT TO THE LOWER END OF A STRING OF PRODUCTION TUBING, THERE BEING A RELATIVELY LARGE DIAMETER AXIAL BORE PROVIDED IN SAID SUB; A PLUNGER SLIDABLE IN SAID BARREL, AND HAVING AN AXIAL PASSAGE CONNECTING THE SPACE IN SAID BARREL BELOW SAID PLUNGER AND THE SPACE IN SAID BARREL BETWEEN SAID PLUNGER AND SAID SUB, THE LATTER SPACE BEING REFERRED TO HEREINAFTER AS THE PUMP CHAMBER; A BOTTOM TRAVELLING VALVE CHECKING DOWNWARD FLUID FLOW THROUGH SAID PASSAGE; A HOLLOW PISTON SLIDABLY FITTING SAID
Claim 2
Dependent Claim
106 words
IN A DEEP WELL PUMP, THE COMBINATION OF: A TUBLAR PUMP BARREL; A SUB CLOSING THE UPPER END OF SAID BARREL AND CONNECTING IT TO THE LOWER END OF A STRING OF PRODUCTION TUBING, THERE BEING A RELATIVELY LARGE DIAMETER AXIAL BORE PROVIDED IN SAID SUB; A PLUNGER SLIDABLE IN SAID BARREL, AND HAVING AN AXIAL PASSAGE CONNECTING THE SPACE IN SAID BARREL BELOW SAID PLUNGER AND THE SPACE IN SAID BARREL BETWEEN SAID PLUNGER AND SAID SUB, THE LATTER SPACE BEING REFERRED TO HEREINAFTER AS THE PUMP CHAMBER; A BOTTOM TRAVELLING VALVE CHECKING DOWNWARD FLUID FLOW THROUGH SAID PASSAGE; A HOLLOW PISTON SLIDABLY FITTING SAID
References Cited (Backward Citations)
US2689535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |