US3272954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heating by induction
Assignee: Deutsche Edelstahlwerke AG
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Filing: 1964-09-25
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Granted: 1966-09-13
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Expires: 1984-09-25
Abstract
No abstract record available.
Inventors
- 👤 Seulen Gerhard
- 👤 Kuhlbars Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:36
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/101; H05B6/36; H05B6/365
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD OF INDUCTIVELY HEATING A WORKPIECE BY MEANS OF AT LEAST TWO INDUCTORS, IN WHICH THE SAID INDUCTORS HAVE THE FORM OF HEATING CONDUCTOR LOOPS WHICH PROVIDE SUBSTANTIALLY CLOSED PATHS FOR THE CURRENT OVER THE WORKPIECE SURFACE, AND WHILE AIR COUPLING BETWEEN THE INDUCTORS IS SUBSTANTIALLY SUPPRESSED THE SAID INDUCTORS ACT SIMULTANEOUSLY ON DIFFERENT AREAS OF THE WORK SURFACE WHILE ENERGISED BY CURRENT SOURCES HAVING DIFFERENT CHARACTERISTICS, FREQUENCIES AND OUTPUTS.
Claim 2
Independent Claim
71 words
A METHOD OF INDUCTIVELY HEATING A WORKPIECE BY MEANS OF AT LEAST TWO INDUCTORS, IN WHICH THE SAID INDUCTORS HAVE THE FORM OF HEATING CONDUCTOR LOOPS WHICH PROVIDE SUBSTANTIALLY CLOSED PATHS FOR THE CURRENT OVER THE WORKPIECE SURFACE, AND WHILE AIR COUPLING BETWEEN THE INDUCTORS IS SUBSTANTIALLY SUPPRESSED THE SAID INDUCTORS ACT SIMULTANEOUSLY ON DIFFERENT AREAS OF THE WORK SURFACE WHILE ENERGISED BY CURRENT SOURCES HAVING DIFFERENT CHARACTERISTICS, FREQUENCIES AND OUTPUTS.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |