Patent US3437778A successfully refreshed from Google Patents.
US3437778A
Expired / Lapsed
US
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Apparatus for inductively heating electrically conducting workpieces
Assignee: SMS Elotherm GmbH
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Filing: 1966-10-27
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Granted: 1969-04-08
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Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Gerhard Seulen
- 👤 Axel Von Starck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:04
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE917198C
Cited
US2448011A
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US2465306A
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US2647982A
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US2669647A
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GB809759A
Cited
US3056876A
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US3272956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |