US3359398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductor
Assignee: Deutsche Edelstahlwerke AG
•
Filing: 1964-07-31
•
Granted: 1967-12-19
•
Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 Reinke Friedhelm
- 👤 Kuhlbars Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:29
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/365; H05B6/10; H05B6/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN INDUCTOR IN THE FORM OF A CLOSED LOOP FOR EXTENDING OVER A SURFACE OF A WORKPIECE TO BE HEATED COMPRISING: A CURRENT CONDUCTING WORK SECTION, SAID WORK SECTION HAVING A WORK SURFACE DISPOSED IN SPACED PARALLEL RELATION TO THE SURFACE OF SAID WORKPIECE, SAID WORK SURFACE HAVING APERTURES THEREIN DISPOSED ACROSS THE PATH OF CURRENT FLOWING THEREIN FOR CONCENTRATING THE CURRENT DISTRIBUTION AT PREDETERMINED POINTS TO PRODUCE A HEATING PATTERN IN THE WORKPIECE, SAID APERTURES EXTENDING THROUGH SAID WORK SECTION IN A DIRECTION PERPENDICULAR TO THE PLANE OF SAID WORK SURFACE.
Claim 2
Dependent Claim
92 words
AN INDUCTOR IN THE FORM OF A CLOSED LOOP FOR EXTENDING OVER A SURFACE OF A WORKPIECE TO BE HEATED COMPRISING: A CURRENT CONDUCTING WORK SECTION, SAID WORK SECTION HAVING A WORK SURFACE DISPOSED IN SPACED PARALLEL RELATION TO THE SURFACE OF SAID WORKPIECE, SAID WORK SURFACE HAVING APERTURES THEREIN DISPOSED ACROSS THE PATH OF CURRENT FLOWING THEREIN FOR CONCENTRATING THE CURRENT DISTRIBUTION AT PREDETERMINED POINTS TO PRODUCE A HEATING PATTERN IN THE WORKPIECE, SAID APERTURES EXTENDING THROUGH SAID WORK SECTION IN A DIRECTION PERPENDICULAR TO THE PLANE OF SAID WORK SURFACE.
References Cited (Backward Citations)
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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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |