Patent US2652441A successfully refreshed from Google Patents.
US2652441A
Expired / Lapsed
US
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Electric melting furnace
Assignee: ABB Norden Holding AB
•
Filing: 1950-07-07
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Granted: 1953-09-15
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Expires: 1970-07-07
Abstract
No abstract record available.
Inventors
- 👤 Sven E Gynt
- 👤 Lundqvist Ragnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:29
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |