US3124672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding inductor
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:52
CPC Classifications
B; B23; B23K; B23K13/00; B23K13/01; B23K13/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
AN INDUCTOR FOR FORMING CONTINUOUS TUBING FROM A METAL STRIP HELICALLY WOUND ON A MANDREL, SAID STRIP HAVING A LEADING EDGE AND A TRAILING EDGE CONVERGING AT A POINT ON THE OUTER SURFACE OF SAID MANDREL, SAID INDUCTOR COMPRISING, A FIRST PORTION AND A SECOND PORTION, SAID FIRST PORTION HAVING TWO ENDS AND BEING SUBSTANTIALLY C-SHAPED TO MATCH THE CIRCUMFERENTIAL SURFACE OF SAID MANDREL, SAID SECOND PORTION ELECTRICALLY JOINING THE ENDS OF SAID FIRST PORTION AND FORMING AN ELECTRICAL LOOP, SAID LOOP EXTENDING ALONG SAID EDGES TO DEFINE A PREHEAT PORTION ADJACENT SAID CONVERGING EDGES AND ACROSS SAID JOINT TO DEFINE A WELDING PORTION ADJACENT SAID POINT OF CONVERGENCE, SAID ELECTRICAL LOOP BEING SPACED ONLY SLIGHTLY RADIALLY FROM SAID EDGES AND SAID JOINT.
References Cited (Backward Citations)
US2841678A
Cited
US2873353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |