US3330359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-reversing scraper
Assignee: Individual
•
Filing: 1965-09-20
•
Granted: 1967-07-11
•
Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Warren F Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:31
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN OIL WELL EQUIPMENT, A PARAFFIN SCRAPER ASSEMBLY FOR MIGRATING UP AND DOWN ON A SUCKER ROD HAVING SPACED ABUTMENTS THEREON AND LOCATED WITHIN A SURROUNDING TUBING STRING, COMPRISING: (A) UPPER AND LOWER BODY PORTIONS FREELY SLIDABLE WITHIN SAID TUBING STRING AND HAVING LONGITUDINAL BORES THERETHROUGH SIZED TO FREELY PASS THE SUCKER ROD, SAID PORTIONS HAVING LONGITUDINAL SLOTS IN THEIR SIDE WALLS EXTENDING THE FULL LENGTH OF THE BODY PORTION, AND THE ADJACENT ENDS OF THE PORTIONS HAVING MATCHING TRANSVERSE SURFACES AT WHICH THEY CAN MUTUALLY MATE; (B) MEANS FOR MAINTAINING THE SLOTS IN THE BODY PORTIONS OUT OF MUTUAL ALIGNMENT; (C) ACTUATOR MEANS ATTACHED TO ONE PORTION AND EXTENDING BEYOND THE OTHER PORTION AND OPERATIVE TO SEPARATE THE BODY PORTIONS WHEN THE ACTUATOR MEANS STRIKES AN ABUTMENT; AND
Claim 2
Dependent Claim
129 words
IN OIL WELL EQUIPMENT, A PARAFFIN SCRAPER ASSEMBLY FOR MIGRATING UP AND DOWN ON A SUCKER ROD HAVING SPACED ABUTMENTS THEREON AND LOCATED WITHIN A SURROUNDING TUBING STRING, COMPRISING: (A) UPPER AND LOWER BODY PORTIONS FREELY SLIDABLE WITHIN SAID TUBING STRING AND HAVING LONGITUDINAL BORES THERETHROUGH SIZED TO FREELY PASS THE SUCKER ROD, SAID PORTIONS HAVING LONGITUDINAL SLOTS IN THEIR SIDE WALLS EXTENDING THE FULL LENGTH OF THE BODY PORTION, AND THE ADJACENT ENDS OF THE PORTIONS HAVING MATCHING TRANSVERSE SURFACES AT WHICH THEY CAN MUTUALLY MATE; (B) MEANS FOR MAINTAINING THE SLOTS IN THE BODY PORTIONS OUT OF MUTUAL ALIGNMENT; (C) ACTUATOR MEANS ATTACHED TO ONE PORTION AND EXTENDING BEYOND THE OTHER PORTION AND OPERATIVE TO SEPARATE THE BODY PORTIONS WHEN THE ACTUATOR MEANS STRIKES AN ABUTMENT; AND
References Cited (Backward Citations)
US627039A
Cited
US2360577A
Cited
US2604364A
Cited
US2655113A
Cited
US2793917A
Cited
US3273648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |