US2704247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making low carbon steel
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1950-11-13
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Granted: 1955-03-15
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Expires: 1970-11-13
Abstract
No abstract record available.
Inventors
- 👤 William G Connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:07
CPC Classifications
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
88 words
A METHOD OF MAKING LOW CARBON STEEL, WHICH CONSISTS IN MELTING DOWN A CHARGE CONTAINING STEEL-MAKING AND SLAG-PRODUCING INGREDIENTS IN AN ELECTRIC FURNACE POWERED BY CARBON ELECTRODES; REFINING THE RESULTING MELT TO MATERIALLY REDUCE THE CARBON CONTENT THEREOF; CUTTING OFF THE POWER TO THE FURANCE; DESLAGGING THE MELT AND DELIVERING METALLIC ALUMINUM THERETO; COVERING THE MELT WITH SLAG-PRODUCING MATERIAL; THEN BLOWING THE MELT WITH GASEOUS OXYGEN TO COMPLETELY OXIDIZE SUCH METALLIC ALUMINUM; AND THEN DELIVERING FULL POWER TO THE FURNACE AND FULLY REDUCING THE SLAG ON THE MELT.
Claim 2
Independent Claim
88 words
A METHOD OF MAKING LOW CARBON STEEL, WHICH CONSISTS IN MELTING DOWN A CHARGE CONTAINING STEEL-MAKING AND SLAG-PRODUCING INGREDIENTS IN AN ELECTRIC FURNACE POWERED BY CARBON ELECTRODES; REFINING THE RESULTING MELT TO MATERIALLY REDUCE THE CARBON CONTENT THEREOF; CUTTING OFF THE POWER TO THE FURANCE; DESLAGGING THE MELT AND DELIVERING METALLIC ALUMINUM THERETO; COVERING THE MELT WITH SLAG-PRODUCING MATERIAL; THEN BLOWING THE MELT WITH GASEOUS OXYGEN TO COMPLETELY OXIDIZE SUCH METALLIC ALUMINUM; AND THEN DELIVERING FULL POWER TO THE FURNACE AND FULLY REDUCING THE SLAG ON THE MELT.
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) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |