US3219786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating device construction
Assignee: Individual
•
Filing: 1962-08-06
•
Granted: 1965-11-23
•
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 19:58
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.
References Cited (Backward Citations)
US1365199A
Cited
US2266176A
Cited
US2090692A
Cited
US2404987A
Cited
US2542393A
Cited
US2893055A
Cited
US3059083A
Cited
US3129459A
Cited
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 |