Patent US4329970A successfully refreshed from Google Patents.
Patent US2650255A successfully refreshed from Google Patents.
US2650255A
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Tilting electrical melting furnace of egg shaped cross section
Assignee: ABB Norden Holding AB
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Filing: 1950-10-27
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Granted: 1953-08-25
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Expires: 1970-10-27
Abstract
No abstract record available.
Inventors
- 👤 Lennart K G Hogel
- 👤 Dreyfus Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:10
CPC Classifications
F; F27; F27B; F27B14/00; F27B14/06; F27B14/061; F27B14/08; F27B14/10
Claims Analysis
Total Claims: 0
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US2556125A
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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) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |