US3148972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparation of pure powdered iron
Assignee: Renault SA
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Filing: 1961-03-10
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Granted: 1964-09-15
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Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
- 👤 Peras Lucien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:14
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0033; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD FOR THE PRODUCTION OF IRON IN POWDERED FORM WITH A CARBON CONTENT OF LESS THAN 0.04% FROM NATURAL CRUDE IRON ORES IN THE FORM OF LUMPS WHICH COMPRISES REACTING SAID ORES WITH GASES CONTAINING CO, CO2, H2, H2O AND N2 AT A TEMPERATURE RANGING FROM 700*C. TO 1100*C. IN ORDER TO REDUCE SAID ORES INTO THE FERROUS OXIDE (FEO), QUENCHING AND CRUSHING THE OBTAINED FERROUS OXIDE AND THEN REDUCING SAID CRUSHED FERROUS OXIDE, IN THE STATE OF A FLUIDIZED BED, WITH SUBSTANTIALLY PURE HYDROGEN UNDER A TEMPERATURE RANGING FROM 600*C. TO 750*C.
Claim 2
Independent Claim
94 words
A METHOD FOR THE PRODUCTION OF IRON IN POWDERED FORM WITH A CARBON CONTENT OF LESS THAN 0.04% FROM NATURAL CRUDE IRON ORES IN THE FORM OF LUMPS WHICH COMPRISES REACTING SAID ORES WITH GASES CONTAINING CO, CO2, H2, H2O AND N2 AT A TEMPERATURE RANGING FROM 700*C. TO 1100*C. IN ORDER TO REDUCE SAID ORES INTO THE FERROUS OXIDE (FEO), QUENCHING AND CRUSHING THE OBTAINED FERROUS OXIDE AND THEN REDUCING SAID CRUSHED FERROUS OXIDE, IN THE STATE OF A FLUIDIZED BED, WITH SUBSTANTIALLY PURE HYDROGEN UNDER A TEMPERATURE RANGING FROM 600*C. TO 750*C.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |