US2767077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for desiliconizing and desulphurizing pig iron
Assignee: Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
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Filing: 1954-01-15
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Granted: 1956-10-16
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Expires: 1974-01-15
Abstract
No abstract record available.
Inventors
- 👤 Perrin Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:05
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR DESILICONIZING AND DESULPHURIZING PIG IRON, WHICH COMPRISES INTRODUCING AN OXYGEN-CONTAINING GAS INTO CONTACT WITH MOLTEN PIG IRON TO OXIDIZE SILICON, IRON AND MANGANESE OF THE PIG IRON TO SILICA, IRON OXIDE AND MANGANESE OXIDE, STOPPING THE INTRODUCTION OF SAID GAS, INTIMATELY MIXING SAID PIG IRON UNDER SUBSTANTIALLY NON-OXIDIZING CONDITIONS WITH A SLAG WHICH CONTAINS SAID OXIDES, IS BASIC AND CONTAINS AN ELEMENT OF THE GROUP CONSISTING OF LIME, MAGNESIA, BARIUM OXIDE AND SODA, AND ALSO A FLUX, UNTIL SILICON REMAINING IN THE PIG IRON REDUCES MOST OF THE IRON AND MANGANESE OXIDES IN THE SLAG TO IRON AND MANGANESE, AND CONTINUING MIXING SAID PIG IRON AND SAID SLAG UNDER SUBSTANTIALLY NON-OXIDIZING CONDITIONS UNTIL THE SULPHUR CONTENT OF THE PIG IRON IS SUBSTANTIALLY REDUCED.
Claim 2
Dependent Claim
126 words
A PROCESS FOR DESILICONIZING AND DESULPHURIZING PIG IRON, WHICH COMPRISES INTRODUCING AN OXYGEN-CONTAINING GAS INTO CONTACT WITH MOLTEN PIG IRON TO OXIDIZE SILICON, IRON AND MANGANESE OF THE PIG IRON TO SILICA, IRON OXIDE AND MANGANESE OXIDE, STOPPING THE INTRODUCTION OF SAID GAS, INTIMATELY MIXING SAID PIG IRON UNDER SUBSTANTIALLY NON-OXIDIZING CONDITIONS WITH A SLAG WHICH CONTAINS SAID OXIDES, IS BASIC AND CONTAINS AN ELEMENT OF THE GROUP CONSISTING OF LIME, MAGNESIA, BARIUM OXIDE AND SODA, AND ALSO A FLUX, UNTIL SILICON REMAINING IN THE PIG IRON REDUCES MOST OF THE IRON AND MANGANESE OXIDES IN THE SLAG TO IRON AND MANGANESE, AND CONTINUING MIXING SAID PIG IRON AND SAID SLAG UNDER SUBSTANTIALLY NON-OXIDIZING CONDITIONS UNTIL THE SULPHUR CONTENT OF THE PIG IRON IS SUBSTANTIALLY REDUCED.
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) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |