US3179022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swab cup for oil well pump assemblies
Assignee: Armco Inc
•
Filing: 1963-12-23
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Granted: 1965-04-20
•
Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Peter S Bloudoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:53
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B37/00; E21B37/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
AN IMPROVED OIL WELL SWAB CUP FOR ASSEMBLY OVER A MANDREL IN CONJUNCTION WITH A THIMBLE-LIKE CUP RETAINER COMPRISING, A TUBULAR BODY OF ELASTOMERIC MATERIAL HAVING A BASE PORTION ADAPTED TO BE RECEIVED IN SAID RETAINER AND A FLEXIBLE SKIRT PORTION ADAPTED TO EXPAND TOWARDS ENGAGEMENT WITH A TUBING WALL, AND A SHEATH OF TEFLON MOLDED AGAINST THE OUTER FACE OF SADI EXPOSED PORTION OF SAID BODY, SAID SHEATH EXTENDING OVER AT LEAST THAT PORTION OF SAID BODY THAT IS JEXTAPOSED TO THE OPEN END OF SAID RETAINER IN THE MOUNTED POSITION OF THE CUP.
Claim 2
Dependent Claim
95 words
AN IMPROVED OIL WELL SWAB CUP FOR ASSEMBLY OVER A MANDREL IN CONJUNCTION WITH A THIMBLE-LIKE CUP RETAINER COMPRISING, A TUBULAR BODY OF ELASTOMERIC MATERIAL HAVING A BASE PORTION ADAPTED TO BE RECEIVED IN SAID RETAINER AND A FLEXIBLE SKIRT PORTION ADAPTED TO EXPAND TOWARDS ENGAGEMENT WITH A TUBING WALL, AND A SHEATH OF TEFLON MOLDED AGAINST THE OUTER FACE OF SADI EXPOSED PORTION OF SAID BODY, SAID SHEATH EXTENDING OVER AT LEAST THAT PORTION OF SAID BODY THAT IS JEXTAPOSED TO THE OPEN END OF SAID RETAINER IN THE MOUNTED POSITION OF THE CUP.
References Cited (Backward Citations)
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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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |