Patent US3531612A successfully refreshed from Google Patents.
US3531612A
Expired / Lapsed
US
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Means for heating by induction
Assignee: Umicore NV SA
•
Filing: 1968-11-21
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Granted: 1970-09-29
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Expires: 1988-11-21
Abstract
No abstract record available.
Inventors
- 👤 Fernand Viart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:40
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/362; B; B23; B23K; B23K13/00; B23K13/01; B23K13/02; B23K13/025; B23K13/04; H05B6/10; H05B6/101; H05B6/103; H05B6/104; B23K2101/00; B23K2101/04; B23K2101/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2852649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |