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US3033671A
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Method of recovering nickel and iron from laterite ores by preferential reduction
Assignee: Tohoku Denki Seitetsu KK
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Filing: 1961-02-06
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Granted: 1962-05-08
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Expires: 1981-02-06
Abstract
No abstract record available.
Inventors
- 👤 Uemura Michio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:49
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN THE METHOD OF RECOVERING NICKEL AND IRON FROM LATERITE ORES BY PREFERENTIAL REDUCTION IN WHICH FERRONICKEL IS PRODUCED AS A DISPERSION OF PARTICLES OF LIQUID THROUGHOUT A MELT CONTAINING THE REMAINDER OF THE IRON OXIDE; THE IMPROVEMENT COMPRISING INCORPORATING IN THE MELT A SMALL BUT EFFECTIVE AMOUNT OF ALKALI HALIDE TO CAUSE THE PARTICLES OF FERRO-NICKEL TO COALESCE INTO A BODY OF LIQUID, AND SEPARATING THE BODY OF LIQUID FERRO-NICKEL FROM THE REMAINDER OF THE MELT.
Claim 2
Dependent Claim
77 words
IN THE METHOD OF RECOVERING NICKEL AND IRON FROM LATERITE ORES BY PREFERENTIAL REDUCTION IN WHICH FERRONICKEL IS PRODUCED AS A DISPERSION OF PARTICLES OF LIQUID THROUGHOUT A MELT CONTAINING THE REMAINDER OF THE IRON OXIDE; THE IMPROVEMENT COMPRISING INCORPORATING IN THE MELT A SMALL BUT EFFECTIVE AMOUNT OF ALKALI HALIDE TO CAUSE THE PARTICLES OF FERRO-NICKEL TO COALESCE INTO A BODY OF LIQUID, AND SEPARATING THE BODY OF LIQUID FERRO-NICKEL FROM THE REMAINDER OF THE MELT.
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) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |