US3072172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for positioning edge portions in butt-welding helical seam tubing
Assignee: American Pipe and Construction Co
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Filing: 1959-05-04
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Granted: 1963-01-08
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Expires: 1979-05-04
Abstract
No abstract record available.
Inventors
- 👤 Burl B Ohnstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:06
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02; B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B23; B23K; B23K9/00; B23K9/02; B23K9/032; B23K9/0325
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN COMBINATION WITH MEANS FOR LONGITUDINALLY ADVANCING A STRIP OF SKELP ALONG A PREDETERMINED PATH INTO POSITION TO BE WELDED IN EDGE-ABUTTING RELATION TO AN END EDGE OF ROTATING CYLINDER BEING FORMED OR THE LIKE, A PAIR OF SURFACE-ENGAGING ROLLERS DISPOSED IN GENERAL RADIAL ALIGNMENT ON OPPOSITE SIDES OF A PORTION MARGINAL TO THE EDGE OF SAID ROTATING CYLINDER, SAID ROLLERS BEING ANGULARLY ADJUSTABLE RELATIVE TO THE DIRECTION OF THEIR
Claim 2
Dependent Claim
70 words
IN COMBINATION WITH MEANS FOR LONGITUDINALLY ADVANCING A STRIP OF SKELP ALONG A PREDETERMINED PATH INTO POSITION TO BE WELDED IN EDGE-ABUTTING RELATION TO AN END EDGE OF ROTATING CYLINDER BEING FORMED OR THE LIKE, A PAIR OF SURFACE-ENGAGING ROLLERS DISPOSED IN GENERAL RADIAL ALIGNMENT ON OPPOSITE SIDES OF A PORTION MARGINAL TO THE EDGE OF SAID ROTATING CYLINDER, SAID ROLLERS BEING ANGULARLY ADJUSTABLE RELATIVE TO THE DIRECTION OF THEIR
References Cited (Backward Citations)
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US2567020A
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US2794409A
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |