US2879137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel and cobalt recovery from ammoniacal solutions
Assignee: Bethlehem Steel Corp
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Filing: 1956-10-12
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Granted: 1959-03-24
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Expires: 1976-10-12
Abstract
No abstract record available.
Inventors
- 👤 Conrad B Bare
- 👤 Robert L Clauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:38
CPC Classifications
C; C01; C01G; C01G53/00; C01G53/05; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS OF SEPARATING NICKEL AND COBALT WHICH COMPRISES TREATING AN OXIDIZED AMMONIACAL AMMONIUM CARBONATE SOLUTION WHICH CONTAINS NICKEL AND COBALT VALUES IN SOLUTION, WITH AN HYDROXIDE OF AT LEAST ONE OF THE GROUP CONSISTING OF SODIUM, POTASSIUM, CALCIUM AND BARIUM AT A TEMPERATURE OF NOT MORE THAN 125*F. AND THEREBY PRECIPITATING A COMPOUND OF NICKEL, SEPARATING PRECIPITATED NICKEL FROM SOLUTION, THEN HEATING THE REMAINING SOLUTION TO DRIVE OFF AMMONIA AND THEREBY PRECIPITATING A COMPOUND OF COBALT.
Claim 2
Dependent Claim
77 words
A PROCESS OF SEPARATING NICKEL AND COBALT WHICH COMPRISES TREATING AN OXIDIZED AMMONIACAL AMMONIUM CARBONATE SOLUTION WHICH CONTAINS NICKEL AND COBALT VALUES IN SOLUTION, WITH AN HYDROXIDE OF AT LEAST ONE OF THE GROUP CONSISTING OF SODIUM, POTASSIUM, CALCIUM AND BARIUM AT A TEMPERATURE OF NOT MORE THAN 125*F. AND THEREBY PRECIPITATING A COMPOUND OF NICKEL, SEPARATING PRECIPITATED NICKEL FROM SOLUTION, THEN HEATING THE REMAINING SOLUTION TO DRIVE OFF AMMONIA AND THEREBY PRECIPITATING A COMPOUND OF COBALT.
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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |