US3153532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for operating a blast furnace
Assignee: Interlake Iron Corp
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Filing: 1960-08-11
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Granted: 1964-10-20
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Expires: 1980-08-11
Abstract
No abstract record available.
Inventors
- 👤 Robert E Touzalin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:37
CPC Classifications
C; C21; C21B; C21B9/00; C21B9/10; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/143
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN THE OPERATION OF A BLAST FURNACEWHEREIN THE HOT AIR BLAST FOR THE FURNACE IS HEATED TO A PREDETERMINED TEMPERATURE ABOVE 1000+1400*F. BY A PLURALITY OF BLAST FURNACE STOVES, THE METHOD OF PRODUCING AND MAINTAINING SAID PREDETERMINED BLAST TERMPERATURE COMPRISING, PLACING ONE OF THE STOVES WHICH HAS BEEN HEATED TO A DOME TEMPERATURE HIGHER THAN SAID PREDTERMINED BLAST TEMPERATURE ON BLAST AND WITHDRAWING HEATED AIR FROM SAID ONE STOVE INTO THE HOT BLAST LINE UNTIL THE TEMPERATURE OF AIR FROM SAID ONE STOVE DROPS TO APPROXIMATELY THE VALUE OF SAID PREDETERMINED BLAST TEMPEATURE, PLACING ANOTHER STOVE ON BLAST IN PARALLEL OPERATING RELATION TO SAID ONE STOVE WHICH OTHER STOVE HAS BEEN PREVIOUSLY HEATED TO A DOME TEMPERATURE GREATER THAN SAID PERDETERMINED BLAST TEMPERATURE AND WITHDRAWING HEATED AIR SIMULTANEOLUSLY, IN A SELECTIVE MANNER FROM BOTH STOVESINTO THE BLAST LINE TO MAINTAIN SAID PREDETERMINED BLAST TEMPERATURE, AND
Claim 2
Dependent Claim
145 words
IN THE OPERATION OF A BLAST FURNACEWHEREIN THE HOT AIR BLAST FOR THE FURNACE IS HEATED TO A PREDETERMINED TEMPERATURE ABOVE 1000+1400*F. BY A PLURALITY OF BLAST FURNACE STOVES, THE METHOD OF PRODUCING AND MAINTAINING SAID PREDETERMINED BLAST TERMPERATURE COMPRISING, PLACING ONE OF THE STOVES WHICH HAS BEEN HEATED TO A DOME TEMPERATURE HIGHER THAN SAID PREDTERMINED BLAST TEMPERATURE ON BLAST AND WITHDRAWING HEATED AIR FROM SAID ONE STOVE INTO THE HOT BLAST LINE UNTIL THE TEMPERATURE OF AIR FROM SAID ONE STOVE DROPS TO APPROXIMATELY THE VALUE OF SAID PREDETERMINED BLAST TEMPEATURE, PLACING ANOTHER STOVE ON BLAST IN PARALLEL OPERATING RELATION TO SAID ONE STOVE WHICH OTHER STOVE HAS BEEN PREVIOUSLY HEATED TO A DOME TEMPERATURE GREATER THAN SAID PERDETERMINED BLAST TEMPERATURE AND WITHDRAWING HEATED AIR SIMULTANEOLUSLY, IN A SELECTIVE MANNER FROM BOTH STOVESINTO THE BLAST LINE TO MAINTAIN SAID PREDETERMINED BLAST TEMPERATURE, AND
References Cited (Backward Citations)
US1816174A
Cited
US1941446A
Cited
FR900286A
Cited
US2601979A
Cited
US2931635A
Cited
US3034775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |