Patent US3219786A successfully refreshed from Google Patents.
US3219786A
Expired / Lapsed
US
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Induction heating device construction
Assignee: Individual
•
Filing: 1962-08-06
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Granted: 1965-11-23
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Expires: 1982-08-06
Abstract
No abstract record available.
Inventors
- 👤 Robert H Wenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:46
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN AN INDUCTION HEATING DEVICE HAVING LONGITUDINALLY EXTENDING INDUCTOR MEANS EXCITABLE BY AN A.C. SOURCE FOR PRODUCING ALTERNATING MAGNETIC FLUX FLOWING LONGITUDINALLY IN AN AXIALLY EXTENDING WORKPIECE OF ELECTRICALLY CONDUCTIVE MATERIAL HAVING HIGH PERMEABILITY, THE PROVISION OF: CASEMENT MEANS OF ELECTRICALLY CONDUCTIVE MATERIAL HAVING LOW PERMEABILITY PROVIDING A CIRCUMFERENTIALLY CONTINUOUS PATH FOR CURRENT FLOW SURROUNDINGNG THE INDUCTOR MEANS AND WORKPIECE, A PORTION OF SAID PATH BEING IN CLOSE PROXIMITY TO THE INDUCTOR MEANS.
Claim 2
Dependent Claim
73 words
IN AN INDUCTION HEATING DEVICE HAVING LONGITUDINALLY EXTENDING INDUCTOR MEANS EXCITABLE BY AN A.C. SOURCE FOR PRODUCING ALTERNATING MAGNETIC FLUX FLOWING LONGITUDINALLY IN AN AXIALLY EXTENDING WORKPIECE OF ELECTRICALLY CONDUCTIVE MATERIAL HAVING HIGH PERMEABILITY, THE PROVISION OF: CASEMENT MEANS OF ELECTRICALLY CONDUCTIVE MATERIAL HAVING LOW PERMEABILITY PROVIDING A CIRCUMFERENTIALLY CONTINUOUS PATH FOR CURRENT FLOW SURROUNDINGNG THE INDUCTOR MEANS AND WORKPIECE, A PORTION OF SAID PATH BEING IN CLOSE PROXIMITY TO THE INDUCTOR MEANS.
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |