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Patent US3326294A successfully refreshed from Google Patents.
US3326294A
Expired / Lapsed
US
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Oil well cleaning tool
Assignee: TRU X TOOL CO
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Filing: 1964-12-18
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Granted: 1967-06-20
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Expires: 1984-12-18
Abstract
No abstract record available.
Inventors
- 👤 William J Neilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:49
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
135 words
IN A CLEANING TOOL: (A) AN ELONGATED BODY; (B) A PLURALITY OF BOSSES ON SAID BODY, EACH BOSS HAVING A PLURALITY OF OUTWARDLY OPENING ELONGATED POCKETS SPACED APART ANNULARLY EQUAL DISTANCES, SAID BODY HAVING FLATTENED SIDES EXTENDING LONGITUDINALLY BETWEEN THE POCKETS; (C) AN ELONGATED CUTTER IN EACH POCKET ADAPTED TO MOVE INWARDLY AND OUTWARDLY RELATIVE TO ITS POCKET; (D) A PLURALITY OF LONGITUDINALLY SPACED TEETH ON THE OUTER SIDE OF THE CUTTERS; (E) YIELDING MEANS URGING SAID CUTTERS OUTWARDLY IN THE RESPECTIVE POCKETS; (F) AND MEANS LIMITING OUTWARD MOVEMENT OF SAID CUTTERS, THE CUTTERS OF ONE BOSS HAVING A DIFFERENT ORIENTATION RELATIVE TO THE CUTTERS OF ANOTHER BOSS SO THAT WHEN THE TOOL IS RECIPROCATED IN A PIPE THE CUTTERS OF ONE BOSS WILL HAVE A DIFFERENT PATH FROM THE CUTTERS OF SAID OTHER BOSS.
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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |