US3606664A
Expired / Lapsed
US
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Leak-proof threaded connections
Assignee: ExxonMobil Upstream Research Co
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Filing: 1969-04-04
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Granted: 1971-09-21
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Expires: 1989-04-04
Abstract
Abstract METHOD AND APPARATUS FOR OBTAINING LEAK-PROOF THREADED PIPE CONNECTIONS FOR EITHER DOUBLE-END MAKEUP OR SINGLE-END MAKEUP. IN EACH INSTANCE, ONE PIPE SECTION IS ROTATED AND THE TORQUE REQUIRED FOR SUCH ROTATION IS MEASURED AND THE NUMBER OF TURNS OF THE ROTATED PIPE SECTION ARE COUNTED. THE NUMBER OF TURNS OF THE COUPLING ARE ALSO COUNTED IN DOUBLE-END MAKEUP. SIGNALS INDICATIVE OF SUCH TORQUES AND TURNS ARE FED TO APPARATUS FOR CONTROL OF CONNECTION MAKEUP.
Inventors
- 👤 Peter D Weiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:13
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/14; B23; B23P; B23P19/00; B23P19/04; B23P19/06; B23P19/061; B23P19/065; B23P19/066; E; E21; E21B; E21B19/00; E21B19/16; E21B19/165; E21B19/166; F; F16; F16L; F16L15/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49764; Y10T29/49766; Y10T29/49767
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |