Patent US2617618A successfully refreshed from Google Patents.
US2711368A
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Process for reducing oxidic iron ore
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1949-12-01
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Granted: 1955-06-21
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Expires: 1969-12-01
Abstract
No abstract record available.
Inventors
- 👤 Warren K Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:59
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0033; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A PROCESS FOR REDUCING FE2O3 IN A REDUCTION ZONE WITH A FLUIDIZED SOLIDS MASS TO SOLID CONTENT OF WHICH COMPRISES 70 TO 95 WEIGHT PER CENT FE AND 5 TO 30 WEIGHT PER CENT FEO, MAINTAINING THE SOLIDS IN SAID REDUCTION ZONE IN A FLUIDIZED STATE BY MEANS OF A REDUCING GAS WHICH ENTERS THE REDUCTION ZONE AS A HYDROCARBON AND IN WHICH A REDUCTION TEMPERATURE OF 750*C. TO 950* C. IS MAINTAINED BY BURNING A PORTION OF SAID HYDROCARBON GAS IN SAID REDUCTION ZONE WITH A COMBUSTION-SUPPORTING GAS, CONTROLLING THE FEED RATE OF HYDROCARBON GAS AND COMBUSTION-SUPPORTING GAS SUCH THAT REDUCTION OF FE2O3 TO FE AND FEO TAKES PLACE, MAINTAINING 5 TO 30 WEIGHT PER CENT OF FEO IN THE FLIDIZED MASS IN SAID REDUCTION ZONE, AND WITHDRAWING FE CONTAINING 5 TO 30 WEIGHT PER CENT FEO FROM SAID REDUCTION ZONE.
Claim 2
Dependent Claim
142 words
A PROCESS FOR REDUCING FE2O3 IN A REDUCTION ZONE WITH A FLUIDIZED SOLIDS MASS TO SOLID CONTENT OF WHICH COMPRISES 70 TO 95 WEIGHT PER CENT FE AND 5 TO 30 WEIGHT PER CENT FEO, MAINTAINING THE SOLIDS IN SAID REDUCTION ZONE IN A FLUIDIZED STATE BY MEANS OF A REDUCING GAS WHICH ENTERS THE REDUCTION ZONE AS A HYDROCARBON AND IN WHICH A REDUCTION TEMPERATURE OF 750*C. TO 950* C. IS MAINTAINED BY BURNING A PORTION OF SAID HYDROCARBON GAS IN SAID REDUCTION ZONE WITH A COMBUSTION-SUPPORTING GAS, CONTROLLING THE FEED RATE OF HYDROCARBON GAS AND COMBUSTION-SUPPORTING GAS SUCH THAT REDUCTION OF FE2O3 TO FE AND FEO TAKES PLACE, MAINTAINING 5 TO 30 WEIGHT PER CENT OF FEO IN THE FLIDIZED MASS IN SAID REDUCTION ZONE, AND WITHDRAWING FE CONTAINING 5 TO 30 WEIGHT PER CENT FEO FROM SAID REDUCTION ZONE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-20 | 1958-12-20 | 1959-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-20 | 1962-12-20 | 1963-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-20 | 1966-12-20 | 1967-06-21 | $7700.00 | Window Closed / Lapsed |