US2811436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing steel
Assignee: Individual
•
Filing: 1954-02-08
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Granted: 1957-10-29
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Expires: 1974-02-08
Abstract
No abstract record available.
Inventors
- 👤 Heuer Russell Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:34
CPC Classifications
C; C21; C21C; C21C1/00; C21C5/00; C21C5/28; C21C5/30; C21C5/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE PROCESS OF PRODUCING STEEL IMPROVED DUCTILITY, WHICH COMPRISES DESULPHURIZING MOLTEN PIG IRON EXTERNAL TO THE BLAST FURNACE IN A CLOSED SPACE UNDER REDUCING CONDITIONS INTENSIFIED BY AN INERT NITROGEN ATMOSPHERE AND IN THE PRESENCE OF A DESULPHURIZING AGENT UNTIL THE SULPHUR CONTENT IS BELOW 0.013 PERCENT BY WEIGHT, CONVERTING THE DESULPHURIZED IRON INTO STEEL IN THE PRESENCE OF A BASIC SLAG AND IN THE ABSENCE OF SULPHUR-BEARING FUEL BY BLOWING WITH OXYGEN CONTAINING SUBSTANTIALLY LESS NITROGEN THAN THAT IN THE AIR AND THUS OXIDIZING IMPURITIES LIBERATING VOLUMINOUS CARBON MONOXIDE AND THEREBY REMOVING NITROGEN, THE SULPHUR CONTENT AT THE END OF BLOWING BEING STILL LESS THAN 0.013 PERCENT BY WEIGHT, AND SEPARATING THE SLAG FROM THE MOLTEN STEEL.
Claim 2
Dependent Claim
118 words
THE PROCESS OF PRODUCING STEEL IMPROVED DUCTILITY, WHICH COMPRISES DESULPHURIZING MOLTEN PIG IRON EXTERNAL TO THE BLAST FURNACE IN A CLOSED SPACE UNDER REDUCING CONDITIONS INTENSIFIED BY AN INERT NITROGEN ATMOSPHERE AND IN THE PRESENCE OF A DESULPHURIZING AGENT UNTIL THE SULPHUR CONTENT IS BELOW 0.013 PERCENT BY WEIGHT, CONVERTING THE DESULPHURIZED IRON INTO STEEL IN THE PRESENCE OF A BASIC SLAG AND IN THE ABSENCE OF SULPHUR-BEARING FUEL BY BLOWING WITH OXYGEN CONTAINING SUBSTANTIALLY LESS NITROGEN THAN THAT IN THE AIR AND THUS OXIDIZING IMPURITIES LIBERATING VOLUMINOUS CARBON MONOXIDE AND THEREBY REMOVING NITROGEN, THE SULPHUR CONTENT AT THE END OF BLOWING BEING STILL LESS THAN 0.013 PERCENT BY WEIGHT, AND SEPARATING THE SLAG FROM THE MOLTEN 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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |