US3232748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of steel
Assignee: BOT Brassert Oxygen Technik AG
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Filing: 1964-07-20
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Granted: 1966-02-01
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Expires: 1984-07-20
Abstract
No abstract record available.
Inventors
- 👤 Rinesch Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:56
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/02; C01; C01B; C01B33/00; C01B33/02; C01B33/021; C01B33/023; C01B33/025; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32; C21C5/42; C21C5/46; C21C5/4606; C22B4/00; C22B5/00; C22B5/02; C22B5/04; C22B5/06; C21C5/56; C21C5/562; C21C5/565; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A PROCESS FOR THE PRODUCTION OF STEEL FROM CHARGING MATERIALS COMPRISING PIG IRON AND SCRAP, SAID PIG IRON CONTAINING IMPURITIES, AT LEAST PART OF SAID CHARGING MATERIALS BEING SOLID, COMPRISING CHARGING SAID SOLID CHARGING MATERIALS INTO AN UPRIGHT CRUCIBLE PROVIDED WITH A VERTICAL BLOWING LANCE ADAPTED TO BE LIFTED AND LOWERED AND HAVING CONNECTIONS TO AN OXYGEN SUPPLY AND TO A FUEL SUPPLY SO THAT IT IS CAPABLE OF OPERATING SELECTIVELY AS A BURNER LANCE AND AS AN OXYGEN BLOWING LANCE; DIRECTING A FLAME OF FUEL AND OXYGEN FROM SAID LANCE OPERATING AS A BURNER LANCE AGAINST SAID SOLID CHARGING MATERIALS SO AS TO HEAT THEM AND TO FORM A CRATER OF LIQUEFIED CHARGING MATERIALS IN THE CENTER OF THE CHARGE; CONTINUING LIQUEFYING AND HEATING SAID CHARGING MATERIALS TO PROVIDE REFINING CONDITIONS; SHUTTING OFF THE FUEL SUPPLY; AND REFINING SAID CHARGE IN SAID CRUCIBLE WITH SAID LANCE OPERATING AS AN OXYGEN BLOWING LANCE TO REMOVE SAID IMPURITIES CONTAINED IN SAID PIG IRON.
Claim 2
Dependent Claim
162 words
A PROCESS FOR THE PRODUCTION OF STEEL FROM CHARGING MATERIALS COMPRISING PIG IRON AND SCRAP, SAID PIG IRON CONTAINING IMPURITIES, AT LEAST PART OF SAID CHARGING MATERIALS BEING SOLID, COMPRISING CHARGING SAID SOLID CHARGING MATERIALS INTO AN UPRIGHT CRUCIBLE PROVIDED WITH A VERTICAL BLOWING LANCE ADAPTED TO BE LIFTED AND LOWERED AND HAVING CONNECTIONS TO AN OXYGEN SUPPLY AND TO A FUEL SUPPLY SO THAT IT IS CAPABLE OF OPERATING SELECTIVELY AS A BURNER LANCE AND AS AN OXYGEN BLOWING LANCE; DIRECTING A FLAME OF FUEL AND OXYGEN FROM SAID LANCE OPERATING AS A BURNER LANCE AGAINST SAID SOLID CHARGING MATERIALS SO AS TO HEAT THEM AND TO FORM A CRATER OF LIQUEFIED CHARGING MATERIALS IN THE CENTER OF THE CHARGE; CONTINUING LIQUEFYING AND HEATING SAID CHARGING MATERIALS TO PROVIDE REFINING CONDITIONS; SHUTTING OFF THE FUEL SUPPLY; AND REFINING SAID CHARGE IN SAID CRUCIBLE WITH SAID LANCE OPERATING AS AN OXYGEN BLOWING LANCE TO REMOVE SAID IMPURITIES CONTAINED IN SAID PIG IRON.
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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |