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US2676242A
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US
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Device for treating workpieces through inductive heating in a high-frequency magnetic field
Assignee: Hartford National Bank and Trust Co
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Filing: 1948-03-01
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Granted: 1954-04-20
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Expires: 1968-03-01
Abstract
No abstract record available.
Inventors
- 👤 Witsenburg Emilius Carolus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:24
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/362
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB446495A
Cited
US2170130A
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US2368809A
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US2381866A
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US2361517A
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US2383992A
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US2385904A
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US2442968A
Cited
US2394944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |