Patent US2071432A successfully refreshed from Google Patents.
Patent US3399548A successfully refreshed from Google Patents.
US3399548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axially extensible rotary drive tool joint
Assignee: Individual
•
Filing: 1966-12-29
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Granted: 1968-09-03
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Expires: 1986-12-29
Abstract
No abstract record available.
Inventors
- 👤 Burns Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:22
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
AN EXTENSIBLE TOOL JOINT INCLUDING, AN ELONGATE, VERTICALLY EXTENDING UPPER OUTER SECTION WITH A LONGITUDINAL CYLINDRICAL BORE, COUPLINGG MEANS AT ITS UPPER END TO CONNECT WITH A RELATED FLUID CONDUCTING UPPER STRUCTURE AND CIRCUMFERENTIALLY SPACED, RADIALLY INWARDLY PROJECTING LUGS AT ITS LOWER END, AND ELONGATE, CYLINDRICAL, VERTICALLY EXTENDING LOWER INNER SECTION WITH A CENTRAL FLOW PASSAGE SLIDABLY ENGAGED IN THE OUTER SECTION WITH ITS LOWER END PORTION DEPENDING THEREFROM, SEALING MEANS CARRIED BY THE UPPER END OF THE INNER SECTION AND SEALING BETWEEN THAT SECTION AND THE BORE, COUPLING MEANS AT THE LOWER END OF SAID INNER LOWER SECTION TO CONNECT WITH A RELATED FLUID CONDUCTING LOWER STRUCTURE AND CIRCUMFERENTIALLY SPACED,
Claim 2
Dependent Claim
111 words
AN EXTENSIBLE TOOL JOINT INCLUDING, AN ELONGATE, VERTICALLY EXTENDING UPPER OUTER SECTION WITH A LONGITUDINAL CYLINDRICAL BORE, COUPLINGG MEANS AT ITS UPPER END TO CONNECT WITH A RELATED FLUID CONDUCTING UPPER STRUCTURE AND CIRCUMFERENTIALLY SPACED, RADIALLY INWARDLY PROJECTING LUGS AT ITS LOWER END, AND ELONGATE, CYLINDRICAL, VERTICALLY EXTENDING LOWER INNER SECTION WITH A CENTRAL FLOW PASSAGE SLIDABLY ENGAGED IN THE OUTER SECTION WITH ITS LOWER END PORTION DEPENDING THEREFROM, SEALING MEANS CARRIED BY THE UPPER END OF THE INNER SECTION AND SEALING BETWEEN THAT SECTION AND THE BORE, COUPLING MEANS AT THE LOWER END OF SAID INNER LOWER SECTION TO CONNECT WITH A RELATED FLUID CONDUCTING LOWER STRUCTURE AND CIRCUMFERENTIALLY SPACED,
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) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |