US2897328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of progressively heating sheet metal and an induction coil for performing the method
Assignee: Deutsche Edelstahlwerke AG
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Filing: 1958-03-17
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Granted: 1959-07-28
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Expires: 1978-03-17
Abstract
No abstract record available.
Inventors
- 👤 Alf Fritz
- 👤 Seul Vincenz
- 👤 Lenze Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:31
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
METHOD OF PROGRESSIVELY INDUCTIVELY HEATING FERRITIC STRIP, OF A THICKNESS NOT LESS THAN 0.10 MM. OR MORE THAN 0.35 MM. TO A TEMPERATURE NOT LESS THAN 200* C. OR MORE THAN 300* C. BY MEANS OF AT LEAST ONE INDUCTION COIL EMBRACING THE STRIP AND OPERATING WITH CURRENT AT MEDIUM FREQUENCY, AND AT A POWER DENSITY OF NOT EXCEEDING 20 WATTS/SQ.CM.
Claim 2
Dependent Claim
61 words
METHOD OF PROGRESSIVELY INDUCTIVELY HEATING FERRITIC STRIP, OF A THICKNESS NOT LESS THAN 0.10 MM. OR MORE THAN 0.35 MM. TO A TEMPERATURE NOT LESS THAN 200* C. OR MORE THAN 300* C. BY MEANS OF AT LEAST ONE INDUCTION COIL EMBRACING THE STRIP AND OPERATING WITH CURRENT AT MEDIUM FREQUENCY, AND AT A POWER DENSITY OF NOT EXCEEDING 20 WATTS/SQ.CM.
References Cited (Backward Citations)
US2408190A
Cited
US2448011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |