Patent US2951890A successfully refreshed from Google Patents.
US2951890A
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Method of operating an electric arc furnace
Assignee: Imperial Chemical Industries Ltd
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Filing: 1958-04-09
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Granted: 1960-09-06
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Expires: 1978-04-09
Abstract
No abstract record available.
Inventors
- 👤 Yeomans Donald Eric
- 👤 Busby Arthur Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:23
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; F; F27; F27D; F27D11/00; F27D11/08; H; H05; H05B; H05B7/00; H05B7/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |