Patent US3171487A successfully refreshed from Google Patents.
US3171487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paraffin cutter
Assignee: Individual
•
Filing: 1962-11-08
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Granted: 1965-03-02
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Expires: 1982-11-08
Abstract
No abstract record available.
Inventors
- 👤 Isaac L Ault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:53
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02; E21B37/04; E21B37/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A SYSTEM FOR REMOVING PARAFFIN FROM OIL WELLS INCLUDING A PARAFFIN CUTTER ASSEMBLY HAVING A MAGNETIZABLE END PORTION AND ADAPTED TO PERIODICALLY DROP WITHIN THE OIL WELL TO A PREDETERMINED POSITION AND THEN RISE TO ITS ORIGINAL POSITION AT THE UPPER END OF THE OIL WELL, ELECTROMAGNETIC MEANS CAPABLE OF PRODUCING A MAGNETIC FIELD MOUNTED ON THE UPPER END OF THE OIL WELL ADAPTED TO RECEIVE SAID MAGNETIZABLE END PORTION OF SAID CUTTER ASSEMBLY, AND MEANS FOR PERIODICALLY AUTOMATICALLY DE-
Claim 2
Independent Claim
80 words
A SYSTEM FOR REMOVING PARAFFIN FROM OIL WELLS INCLUDING A PARAFFIN CUTTER ASSEMBLY HAVING A MAGNETIZABLE END PORTION AND ADAPTED TO PERIODICALLY DROP WITHIN THE OIL WELL TO A PREDETERMINED POSITION AND THEN RISE TO ITS ORIGINAL POSITION AT THE UPPER END OF THE OIL WELL, ELECTROMAGNETIC MEANS CAPABLE OF PRODUCING A MAGNETIC FIELD MOUNTED ON THE UPPER END OF THE OIL WELL ADAPTED TO RECEIVE SAID MAGNETIZABLE END PORTION OF SAID CUTTER ASSEMBLY, AND MEANS FOR PERIODICALLY AUTOMATICALLY DE-
References Cited (Backward Citations)
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US2267902A
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US2829915A
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Cited
US2893493A
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US3031971A
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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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |