US2667524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating furnace
Assignee: ABB Norden Holding AB
•
Filing: 1950-12-29
•
Granted: 1954-01-26
•
Expires: 1970-12-29
Abstract
No abstract record available.
Inventors
- 👤 Dreyfus Ludwig
- 👤 Lindstrom Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:19
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1813591A
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US1807147A
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US1861869A
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US2052010A
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US2044763A
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GB523785A
Cited
US2404987A
Cited
US2490206A
Cited
US2481008A
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US2513778A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |