Patent US3270411A successfully refreshed from Google Patents.
US3270411A
Expired / Lapsed
US
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Method for preparing and girth welding pipe ends
Assignee: AMF Inc
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Filing: 1963-04-22
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Granted: 1966-09-06
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Expires: 1983-04-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:40
CPC Classifications
B; B23; B23K; B23K37/00; B23K37/04; B23K37/053; B23K37/0531
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A METHOD FOR WELDING TOGETHER THE ADJACENT ENDS OF PIPE JOINTS WHICH HAVE BEEN STRUNG ALONG A PIPELINE RIGHT-OF-WAY IN APPROXIMATE END-TO-END POSITIONS, THE STEPS COMPRISING MEASURING ADJACENT ENDS OF THE PIPE JOINTS TO DETERMINE IF THE DIAMETER OF ANY ONE PAIR OF ADJACENT ENDS IS SUFFICIENTLY SMALLER THAN THAT OF THE OTHER END OF SAID PAIR THAT THE ENDS CANNOT BE SATISFACTORY WELDED TOGETHER; RADIALLY EXPANDING THE CIRCUMFERENCE OF ANY SUCH SMALLER END BY APPLYING SUFFICIENT EXPANSIVE FORCE THERETO TO EXCEED THE YIELD OF THE METAL OF THE SMALLER
Claim 2
Dependent Claim
91 words
IN A METHOD FOR WELDING TOGETHER THE ADJACENT ENDS OF PIPE JOINTS WHICH HAVE BEEN STRUNG ALONG A PIPELINE RIGHT-OF-WAY IN APPROXIMATE END-TO-END POSITIONS, THE STEPS COMPRISING MEASURING ADJACENT ENDS OF THE PIPE JOINTS TO DETERMINE IF THE DIAMETER OF ANY ONE PAIR OF ADJACENT ENDS IS SUFFICIENTLY SMALLER THAN THAT OF THE OTHER END OF SAID PAIR THAT THE ENDS CANNOT BE SATISFACTORY WELDED TOGETHER; RADIALLY EXPANDING THE CIRCUMFERENCE OF ANY SUCH SMALLER END BY APPLYING SUFFICIENT EXPANSIVE FORCE THERETO TO EXCEED THE YIELD OF THE METAL OF THE SMALLER
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |