Patent US2786747A successfully refreshed from Google Patents.
US2786747A
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US
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Reduction of iron ores by carbon and steam and plant for carrying it into effect
Assignee: Ateliers des Charmilles SA
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Filing: 1954-04-06
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Granted: 1957-03-26
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Expires: 1974-04-06
Abstract
No abstract record available.
Inventors
- 👤 Gallusser Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:42
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/02; C21B13/023; C21B13/026; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS FOR REDUCING IRON ORE COMPRISING RAISING A PREHEATED MIXTURE OF IRON ORE AND CARBON TO A TEMPERATURE OF AT LEAST 750*C. IN A CLOSED SHAFTER FURNACE, HOLDING SAID MIXTURE AT A TEMPERATURE OF AT LEAST 950* C., INTRODUCING STEAM INTO SAID MIXTURE, THEREBY BRINGING ABOUT THE REACTION OF SAID STEAM WITH A PORTION OF SAID CARBON TO FORM CARBON MONOXIDE AND HYDROGEN GASES, REACTING SAID SO-FORMED GASES WITH A PORTION OF SAID ORE TO FORM IRON, CARBON DIOXIDE AND STREAM, REACTING SAID SO-FORMED STEAM WITH ADDITIONAL CARBON TO FORM ADDITIONAL QUANTITIES OF CARBON MONOXIDE AND HYDROGEN GASES, FURTHER REACTING SAID LATTER SO-FORMED GASES WITH AN ADDITIONAL PORTION OF ORE TO FORM IRON,, CARBON DIOXIDE, AND STEAM, REMOVING THE UNREACTED STEAM CAN CARBON DIOXIDE,
Claim 2
Dependent Claim
125 words
A PROCESS FOR REDUCING IRON ORE COMPRISING RAISING A PREHEATED MIXTURE OF IRON ORE AND CARBON TO A TEMPERATURE OF AT LEAST 750*C. IN A CLOSED SHAFTER FURNACE, HOLDING SAID MIXTURE AT A TEMPERATURE OF AT LEAST 950* C., INTRODUCING STEAM INTO SAID MIXTURE, THEREBY BRINGING ABOUT THE REACTION OF SAID STEAM WITH A PORTION OF SAID CARBON TO FORM CARBON MONOXIDE AND HYDROGEN GASES, REACTING SAID SO-FORMED GASES WITH A PORTION OF SAID ORE TO FORM IRON, CARBON DIOXIDE AND STREAM, REACTING SAID SO-FORMED STEAM WITH ADDITIONAL CARBON TO FORM ADDITIONAL QUANTITIES OF CARBON MONOXIDE AND HYDROGEN GASES, FURTHER REACTING SAID LATTER SO-FORMED GASES WITH AN ADDITIONAL PORTION OF ORE TO FORM IRON,, CARBON DIOXIDE, AND STEAM, REMOVING THE UNREACTED STEAM CAN CARBON DIOXIDE,
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) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |