Patent US2991173A successfully refreshed from Google Patents.
US2991173A
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Metal refining method and apparatus
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1960-02-26
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Granted: 1961-07-04
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Expires: 1980-02-26
Abstract
No abstract record available.
Inventors
- 👤 Trentini Bernard
- 👤 Vayssiere Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:58
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN A PROCESS FOR REFINING A BATH OF CARBON-CONTAINING MOLTEN METAL WHEREIN CARBON MONOXIDE IS FORMED AND EMANATES FROM SAID BATH INTO A REGION ADJACENT THE UPPER SURFACE OF SAID BATH, THE STEPS OF CONTACTING THE EMANATED CARBON MONOXIDE IN SAID REGION WITH A COMBUSTION SUPPORTING OXIDIZING GAS SO AS TO OXIDIZE SAID CARBON MONOXIDE TO CARBON DIOXIDE, AND SIMULTANEOUSLY DIRECTING A STREAM OF PARTICULATE SOLID MATERIAL THROUGH SAID REGION INTO SAID BATH SO THAT THE PARTICLES OF SAID STREAM WHILE PASSING THROUGH THAT REGION WILL ABSORB AT LEAST A PORTION OF THE HEAT DEVELOPED BY OXIDIZATION OF SAID CARBON MONOXIDE AND THE THUS ABSORBED HEAT WILL BE INTRODUCED BY SAID PARTICULATE MATERIAL INTO SAID MOLTEN BATH.
Claim 2
Dependent Claim
117 words
IN A PROCESS FOR REFINING A BATH OF CARBON-CONTAINING MOLTEN METAL WHEREIN CARBON MONOXIDE IS FORMED AND EMANATES FROM SAID BATH INTO A REGION ADJACENT THE UPPER SURFACE OF SAID BATH, THE STEPS OF CONTACTING THE EMANATED CARBON MONOXIDE IN SAID REGION WITH A COMBUSTION SUPPORTING OXIDIZING GAS SO AS TO OXIDIZE SAID CARBON MONOXIDE TO CARBON DIOXIDE, AND SIMULTANEOUSLY DIRECTING A STREAM OF PARTICULATE SOLID MATERIAL THROUGH SAID REGION INTO SAID BATH SO THAT THE PARTICLES OF SAID STREAM WHILE PASSING THROUGH THAT REGION WILL ABSORB AT LEAST A PORTION OF THE HEAT DEVELOPED BY OXIDIZATION OF SAID CARBON MONOXIDE AND THE THUS ABSORBED HEAT WILL BE INTRODUCED BY SAID PARTICULATE MATERIAL INTO SAID MOLTEN BATH.
References Cited (Backward Citations)
GB717865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |