US3746534A
Expired / Lapsed
US
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Method of treating ferrous metals with oxygen containing a non gaseous fluidized fuel
Assignee: Union Carbide Industrial Gases Technology Corp
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Filing: 1964-03-31
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Granted: 1973-07-17
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Expires: 1984-03-31
Abstract
Abstract A PROCESS FOR MANUFACTURING STEEL, INCLUDING THE REFINING STEP OF TOP-BLOWING A MOLTEN FERROUS CHARGE WITH AT LEAST ONE OXYGEN STREAM, WHEREIN A NON-GASEOUS FLUIDIZED FUEL IS INTRODUCED INTO SAID OXYGEN STREAM CONTINUOUSLY THROUGHOUT THE REFINING STEP IN AN AMOUNT SUFFICIENT TO SUPPRESS IRON OXIDE FUME FORMATION, AND SAID NON-GASEOUS FLUIDIZED FUEL COMPRISES A SOLID FUEL SUSPENDED IN A LIQUID CARRIER. SAID NON-GASEOUS FLUIDIZED FUEL MAY ALSO CONTAIN A FINE DISPERSION OF SLAG-FORMATION MATERIALS FOR INJECTION INTO THE FERROUS METAL CHARGE.
Inventors
- 👤 A Szekely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:07
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32; C21C5/42; C21C5/46; C21C5/4606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |