Patent US2715575A successfully refreshed from Google Patents.
US2715575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating iron ore blast furnaces
Assignee: Barium Steel Corp
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Filing: 1953-05-07
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Granted: 1955-08-16
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Expires: 1973-05-07
Abstract
No abstract record available.
Inventors
- 👤 Coutant Jay Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:46
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/06; C21B2100/00; C21B2100/60; C21B2100/64; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
THE METHOD OF OPERATING A BLAST FURNACE IN THE MANUFACTURE OF IRON FROM IRON ORE WHICH COMPRISES INJECTING A BLAST GAS COMPRISING AT LEAST ABOUT 25% OF OXYGEN INTO THE HIGH TEMPERATURE ZONE TO A BLAST FURNACE TO BURN AND HEAT COKE THEREIN TO INCANDESCENCE; INJECTING WATER VAPOR INTO THE HIGH TEMPERATURE ZONE OF THE BLAST FURNACE, REACTING THE WATER VAPOR WITH INCANDESCENT COKE THEREIN TO PRODUCE CARBON MONOXIDE AND HYDROGEN, REDUCING IRON ORE IN SAID BLAST FURNACE BY MEANS OF SAID CARBON MONOXIDE AND HYDROGEN, THE PROPORTION OF WATER VAPOR TO OXYGEN INJECTED INTO THE BLAST FURNACE MAINTAINING THE TEMPERATURES IN THE BLAST FURNACE AT BLAST FURNACE OPERATING LEVELS, REMOVING THE RESULTING BLAST FURNACE GAS FROM THE TOP OF SAID BLAST FURNACE, ADDING WATER VAPOR TO SAID GASES AND RECIRCULATING SAID GASES TO THE BLAST FURNACE FOR FURTHER INJECTION THEREOF INTO THE BLAST FURNACE.
Claim 2
Independent Claim
145 words
THE METHOD OF OPERATING A BLAST FURNACE IN THE MANUFACTURE OF IRON FROM IRON ORE WHICH COMPRISES INJECTING A BLAST GAS COMPRISING AT LEAST ABOUT 25% OF OXYGEN INTO THE HIGH TEMPERATURE ZONE TO A BLAST FURNACE TO BURN AND HEAT COKE THEREIN TO INCANDESCENCE; INJECTING WATER VAPOR INTO THE HIGH TEMPERATURE ZONE OF THE BLAST FURNACE, REACTING THE WATER VAPOR WITH INCANDESCENT COKE THEREIN TO PRODUCE CARBON MONOXIDE AND HYDROGEN, REDUCING IRON ORE IN SAID BLAST FURNACE BY MEANS OF SAID CARBON MONOXIDE AND HYDROGEN, THE PROPORTION OF WATER VAPOR TO OXYGEN INJECTED INTO THE BLAST FURNACE MAINTAINING THE TEMPERATURES IN THE BLAST FURNACE AT BLAST FURNACE OPERATING LEVELS, REMOVING THE RESULTING BLAST FURNACE GAS FROM THE TOP OF SAID BLAST FURNACE, ADDING WATER VAPOR TO SAID GASES AND RECIRCULATING SAID GASES TO THE BLAST FURNACE FOR FURTHER INJECTION THEREOF INTO THE BLAST FURNACE.
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) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |