Patent US3197539A successfully refreshed from Google Patents.
US3197539A
Expired / Lapsed
US
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Method of operating electric arc furnace
Assignee: Union Carbide Corp
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Filing: 1962-07-11
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Granted: 1965-07-27
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Expires: 1982-07-11
Abstract
No abstract record available.
Inventors
- 👤 Gene W Hinds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:18
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; C21C5/5211; C21C5/5217; F; F27; F27D; F27D11/00; F27D11/08; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN THE METHOD OF MELTING SCRAP IN AN ELECTRIC ARCFURNACE, IN WHICH THE SCRAP IS CHARGED INTO THE FURNACE, THE ELECTRODES ARE LOWERED, THE MELTING CURRENT IS TURNED ON, AND HEAT IS APPLIED TO THE SCRAP BY THE ELECTRODES IN THE FURNACE, THE IMPROVEMENT WHICH COMPRISES PASSING STREAMS OF FUEL AND AN OXIDANT DOWN THROUGH THE ROOF FROM STATIONS SPACED THEREAROUND IN A CIRCLE BETWEEN THE ELCTRODES AND THE FURNACE WALLS, TO FORM A COMBUSTIBLE MIXTURE,
Claim 2
Dependent Claim
76 words
IN THE METHOD OF MELTING SCRAP IN AN ELECTRIC ARCFURNACE, IN WHICH THE SCRAP IS CHARGED INTO THE FURNACE, THE ELECTRODES ARE LOWERED, THE MELTING CURRENT IS TURNED ON, AND HEAT IS APPLIED TO THE SCRAP BY THE ELECTRODES IN THE FURNACE, THE IMPROVEMENT WHICH COMPRISES PASSING STREAMS OF FUEL AND AN OXIDANT DOWN THROUGH THE ROOF FROM STATIONS SPACED THEREAROUND IN A CIRCLE BETWEEN THE ELCTRODES AND THE FURNACE WALLS, TO FORM A COMBUSTIBLE MIXTURE,
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |