US3248512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for welding metal tubing
Assignee: Ohio Crankshaft Co
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Filing: 1963-12-19
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Granted: 1966-04-26
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Expires: 1983-12-19
Abstract
No abstract record available.
Inventors
- 👤 Richard A Sommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:40
CPC Classifications
B; B23; B23K; B23K13/00; B23K13/01; B23K13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN A WELDING MILL OF THE TYPE ADAPTED TO FORM TUBING BY WELDING THE CONVERGING EDGES OF AN ADVANCING SKELP, COMPRISING A WELDING INDUCTOR ADJACENT THE POINT OF CONVERGENCE OF SAID EDGES AND A PREHEATING INDUCTOR ADJACENT SAID EDGES AND IN ADVANCE OF SAID WELDING INDUCTOR, THE IMPROVEMENT COMPRISING: MEANS FOR FORMING A LOW RESISTANCE PATH ACROSS SAID EDGES AND BETWEEN SAID INDUCTOR, SAID MEANS INCLUDING A LOW RESISTIVITY RING SURROUNDING SAID SKELP AND BETWEEN SAID INDUCTORS.
Claim 2
Dependent Claim
77 words
IN A WELDING MILL OF THE TYPE ADAPTED TO FORM TUBING BY WELDING THE CONVERGING EDGES OF AN ADVANCING SKELP, COMPRISING A WELDING INDUCTOR ADJACENT THE POINT OF CONVERGENCE OF SAID EDGES AND A PREHEATING INDUCTOR ADJACENT SAID EDGES AND IN ADVANCE OF SAID WELDING INDUCTOR, THE IMPROVEMENT COMPRISING: MEANS FOR FORMING A LOW RESISTANCE PATH ACROSS SAID EDGES AND BETWEEN SAID INDUCTOR, SAID MEANS INCLUDING A LOW RESISTIVITY RING SURROUNDING SAID SKELP AND BETWEEN SAID INDUCTORS.
References Cited (Backward Citations)
GB716378A
Cited
US2965740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |