US3234011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of steel
Assignee: BOT Brassert Oxygen Technik AG
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Filing: 1963-03-21
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Granted: 1966-02-08
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Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Rinesch Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:34
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A PROCESS FOR THE PRODUCTION OF STEEL COMPRISING INTRODUCING INTO A CRUCIBLE A CHARGE CONTAINING SLAGFORMING MATERIALS AND A FERROUS CHARGING MATERIAL SELECTED FROM THE GROUP CONSISTING OF LIQUID AND SOLID CRUDE IRON, AND SCRAP, SAID CHARGE HAVING A CONTENT OF CHEMICAL HEAT CARRIES WHICH IS INSUFFICIENT FOR ATTAINING THE TEMPERATURE REQUIRED FOR TEEMING, BLOWING THE CHARGE FROM ABOVE WITH AN OXYGEN-CONTAINING GAS AND A FUEL TO SUPPLY HEAT TO AND REFINE THE CHARGE IN A COMBINED HEATING AND REFINING PERIOD (BOILING PERIOD), THE RATE OF WHICH SAID FUEL AND THE OXYGEN ARE SUPPLIED BEING CONTROLLED DURING THE BOILING PERIOD SO THAT THE OXYGEN REQUIRED FOR THE COMBUSTION OF SAID FUEL WILL NOT EXCEED 70% OF THE OXYGEN REQUIRED FOR OXIDIZING SAID CHEMICAL HEAT CARRIERS, AND TERMINATING THE ADDITION OF FUEL AT A CARBON VALUE RANGING FROM 0.20 A 0.50% ABOVE THE CARBON CONTENT DESIRED IN THE FINISHED STEEL.
Claim 2
Dependent Claim
149 words
A PROCESS FOR THE PRODUCTION OF STEEL COMPRISING INTRODUCING INTO A CRUCIBLE A CHARGE CONTAINING SLAGFORMING MATERIALS AND A FERROUS CHARGING MATERIAL SELECTED FROM THE GROUP CONSISTING OF LIQUID AND SOLID CRUDE IRON, AND SCRAP, SAID CHARGE HAVING A CONTENT OF CHEMICAL HEAT CARRIES WHICH IS INSUFFICIENT FOR ATTAINING THE TEMPERATURE REQUIRED FOR TEEMING, BLOWING THE CHARGE FROM ABOVE WITH AN OXYGEN-CONTAINING GAS AND A FUEL TO SUPPLY HEAT TO AND REFINE THE CHARGE IN A COMBINED HEATING AND REFINING PERIOD (BOILING PERIOD), THE RATE OF WHICH SAID FUEL AND THE OXYGEN ARE SUPPLIED BEING CONTROLLED DURING THE BOILING PERIOD SO THAT THE OXYGEN REQUIRED FOR THE COMBUSTION OF SAID FUEL WILL NOT EXCEED 70% OF THE OXYGEN REQUIRED FOR OXIDIZING SAID CHEMICAL HEAT CARRIERS, AND TERMINATING THE ADDITION OF FUEL AT A CARBON VALUE RANGING FROM 0.20 A 0.50% ABOVE THE CARBON CONTENT DESIRED IN THE FINISHED STEEL.
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |