US3145783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-well screen drive point
Assignee: Individual
•
Filing: 1962-12-24
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Granted: 1964-08-25
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Expires: 1982-12-24
Abstract
No abstract record available.
Inventors
- 👤 David L Sibley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:42
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/18; E03; E03B; E03B3/00; E03B3/06; E03B3/08; E03B3/12; E21B43/00; E21B43/02; E21B43/08; E21B43/086; E21B43/088; E21B7/20; Y; Y02; Y02A; Y02A20/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A WATER-WELL SCREEN DRIVE-POINT COMPRISING AN OUTER TUBE HAVING ITS LOWER PORTION CONICALLY SHAPED TO PROVIDE A RELATIVELY SMALL AXIAL CIRCULAR OPENING AT ITS LOWER END, AND HAVING SERIES OF SPACED HOLES IN ITS UPPER PORTION; AN INNER TUBE WITHIN THE OUTER TUBE AND EXTENDING FROM THE UPPER PORTION OF THE OUTER TUBE TO THE CONICALLY SHAPED PORTION, SAID INNER TUBE HAVING ANOTHER SERIES OF SPACED HOLES THEREIN REGISTERING WITH THOSE OF THE OUTER TUBE; A SCREEN CLOSELY FITTING THE EXTERIOR OF THE INNER TUBE AND CONTACTING THE INNER WALL OF THE OUTER TUBE; A PLUG OF CYLINDRICAL SHAPE FITTED WITHIN THE LOWER END OF THE INNER TUBE AND HAVING ITS LOWER END PORTION CONICALLY FORMED TO CONFORM WITH THE CONICAL PORTION OF THE OUTER TUBE AND TERMINATING ABOVE THE CIRCULAR OPENING, SAID PLUG HAVING AN AXIAL BORE THEREIN EXTENDING UPWARDLY FROM ITS LOWER END; A DETACHABLE POINT MEMBER HAVING A CONICAL HEAD FORMING A CONTINUATION OF THE CONICAL PORTION OF THE OUTER TUBE AND HAVING A THREADED SHANK ENGAGING THE WALLS OF THE BORE IN THE PLUG; AND MEANS FOR LOCKING THE INNER TUBE WITHIN THE OUTER TUBE.
Claim 2
Dependent Claim
189 words
A WATER-WELL SCREEN DRIVE-POINT COMPRISING AN OUTER TUBE HAVING ITS LOWER PORTION CONICALLY SHAPED TO PROVIDE A RELATIVELY SMALL AXIAL CIRCULAR OPENING AT ITS LOWER END, AND HAVING SERIES OF SPACED HOLES IN ITS UPPER PORTION; AN INNER TUBE WITHIN THE OUTER TUBE AND EXTENDING FROM THE UPPER PORTION OF THE OUTER TUBE TO THE CONICALLY SHAPED PORTION, SAID INNER TUBE HAVING ANOTHER SERIES OF SPACED HOLES THEREIN REGISTERING WITH THOSE OF THE OUTER TUBE; A SCREEN CLOSELY FITTING THE EXTERIOR OF THE INNER TUBE AND CONTACTING THE INNER WALL OF THE OUTER TUBE; A PLUG OF CYLINDRICAL SHAPE FITTED WITHIN THE LOWER END OF THE INNER TUBE AND HAVING ITS LOWER END PORTION CONICALLY FORMED TO CONFORM WITH THE CONICAL PORTION OF THE OUTER TUBE AND TERMINATING ABOVE THE CIRCULAR OPENING, SAID PLUG HAVING AN AXIAL BORE THEREIN EXTENDING UPWARDLY FROM ITS LOWER END; A DETACHABLE POINT MEMBER HAVING A CONICAL HEAD FORMING A CONTINUATION OF THE CONICAL PORTION OF THE OUTER TUBE AND HAVING A THREADED SHANK ENGAGING THE WALLS OF THE BORE IN THE PLUG; AND MEANS FOR LOCKING THE INNER TUBE WITHIN THE OUTER TUBE.
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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |