US2994601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel recovery from ore
Assignee: Individual
•
Filing: 1958-02-03
•
Granted: 1961-08-01
•
Expires: 1978-02-03
Abstract
No abstract record available.
Inventors
- 👤 Albert E Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:23
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/02; C22B23/021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE PROCESS OF TREATING NICKEL AND OXIDE IRON ORES CONTAINING FROM LESS THAN 1% OF NICKEL AND SEVERAL PERCENT OF IRON UP TO SEVERAL PERCENT OF NICKEL AND MUCH LARGER PERCENTS OF IRON, SAID PROCESS CONSISTING IN PREPARING SMALL PARTICLE CHARGE OF THE ORE, PREHEATING THIS IN A COMBUSTION HEATED FURNACE UP TO THE TEMPERATURE OF REDUCTION OF THE NICKEL OXIDE, DISCHARGING THE HOT PREHEATED MIX INTO ANOTHER FURNACE AND THERE HEATING IT TOGETHER WITH REDUCING MATERIAL IN SUFFICIENT PROPORTION TO REDUCE ALL OF THE NICKEL OXIDE BUT NOT MORE THAN FOUR TIMES AS MUCH IRON, REDUCING NICKEL AND IRON OXIDES AND FORMING DENSE METAL PARTICLES, AND DISCHARGING AND COOLING THE REDUCED NICKEL-IRON PARTICLES.
Claim 2
Dependent Claim
114 words
THE PROCESS OF TREATING NICKEL AND OXIDE IRON ORES CONTAINING FROM LESS THAN 1% OF NICKEL AND SEVERAL PERCENT OF IRON UP TO SEVERAL PERCENT OF NICKEL AND MUCH LARGER PERCENTS OF IRON, SAID PROCESS CONSISTING IN PREPARING SMALL PARTICLE CHARGE OF THE ORE, PREHEATING THIS IN A COMBUSTION HEATED FURNACE UP TO THE TEMPERATURE OF REDUCTION OF THE NICKEL OXIDE, DISCHARGING THE HOT PREHEATED MIX INTO ANOTHER FURNACE AND THERE HEATING IT TOGETHER WITH REDUCING MATERIAL IN SUFFICIENT PROPORTION TO REDUCE ALL OF THE NICKEL OXIDE BUT NOT MORE THAN FOUR TIMES AS MUCH IRON, REDUCING NICKEL AND IRON OXIDES AND FORMING DENSE METAL PARTICLES, AND DISCHARGING AND COOLING THE REDUCED NICKEL-IRON PARTICLES.
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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |