US2666830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and furnace for heating bars to be forged by means of eddy currents
Assignee: ABB Norden Holding AB
•
Filing: 1950-12-19
•
Granted: 1954-01-19
•
Expires: 1970-12-19
Abstract
No abstract record available.
Inventors
- 👤 Dreyfus Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:55
CPC Classifications
B; B21; B21J; B21J17/00; B21J17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1682112A
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US1697811A
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US1646498A
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US1693370A
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US2102417A
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US2141163A
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US2236177A
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US2473245A
Cited
US2493785A
Cited
US2507817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |