US2909422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the quality and productivity of electric arc furnace steel
Assignee: Union Carbide Corp
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Filing: 1957-07-02
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Granted: 1959-10-20
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Expires: 1977-07-02
Abstract
No abstract record available.
Inventors
- 👤 William E Schwabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:30
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/08; C; C21; C21C; C21C5/00; C21C5/52; C21C5/5211; C21C5/5217; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN THE MANUFACTURE OF ELECTRIC-ARC FURNACE STEEL WHEREIN A CARBONACEOUS ELECRODE HACING A LONGITUDINAL BORE IS UTILIZED IN FUSING, MELTING AND REFINING A CHARGE OF METAL, AND AN ARC IS STRUCK BETWEEN SAID ELECTRODE AND AND CHARGE, THE IMPROVEMENT OF MAINTAINING OPTIMUM POWER UNDER THE NORMALLY PREVALENT ERRATIC CONDITIONS IN SAID FURNACE, SAID IMPROVEMENT COMPRISING INTRODUCING INTO SAID BORE AN ARC-SUSTAINING MATERIAL WHEN SAID ARC IS TOO LONG IN ORDER TO PREVENT ARC EXTINCTION AND MAINTAIN OPTIMUM POWER, AND AN ARC-SUPPRESSING MATERIAL WHEN SAID ARC IS TOO SHORT TO MAINTAIN OPTIMUM POWER.
Claim 2
Dependent Claim
92 words
IN THE MANUFACTURE OF ELECTRIC-ARC FURNACE STEEL WHEREIN A CARBONACEOUS ELECRODE HACING A LONGITUDINAL BORE IS UTILIZED IN FUSING, MELTING AND REFINING A CHARGE OF METAL, AND AN ARC IS STRUCK BETWEEN SAID ELECTRODE AND AND CHARGE, THE IMPROVEMENT OF MAINTAINING OPTIMUM POWER UNDER THE NORMALLY PREVALENT ERRATIC CONDITIONS IN SAID FURNACE, SAID IMPROVEMENT COMPRISING INTRODUCING INTO SAID BORE AN ARC-SUSTAINING MATERIAL WHEN SAID ARC IS TOO LONG IN ORDER TO PREVENT ARC EXTINCTION AND MAINTAIN OPTIMUM POWER, AND AN ARC-SUPPRESSING MATERIAL WHEN SAID ARC IS TOO SHORT TO MAINTAIN OPTIMUM POWER.
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) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |