Patent US2780666A successfully refreshed from Google Patents.
US2780666A
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US
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Induction furnace control and method
Assignee: RMI Co
•
Filing: 1954-04-06
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Granted: 1957-02-05
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Expires: 1974-04-06
Abstract
No abstract record available.
Inventors
- 👤 Richard M Scriver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:57
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1068558A
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US1197042A
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US1812172A
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US1747934A
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US1734536A
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US1897589A
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US2573319A
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US2686864A
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US2686865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |