US2520958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel recovery
Assignee: Individual
•
Filing: 1947-01-14
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Granted: 1950-09-05
•
Expires: 1967-01-14
Abstract
No abstract record available.
Inventors
- 👤 Poole Henry Gordon
- 👤 Sol F Ravitz
- 👤 Karl C Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:23
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B23/0446
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE PROCESS FOR THE PRODUCTION OF NICKEL AMMONIUM SULFATE WHICH COMPRISES REACTING OXIDIC NICKEL ORE WITH AMMONIUM SULFATE AT ELEVATED TEMPERATURES OF ABOUT 400 DEGREES CENTIGRADE, TREATING THE REACTION PRODUCT SO FORMED WITH AN AQUEOUS SOLUTION OF AMMONIUM HYDROXIDE AND AMMONIUM CARBONATE, SEPARATING THE INSOLUBLE SUBSTANCES AND THE MOTHER LIQUOR WHEREBY THE NICKEL VALUES ARE CONVERTED TO NICKEL AMMONIA SULFATE IN SOLUTION WITH AMMONIUM SULFATE; EVAPORATING SAID SOLUTION THEREBY PRECIPITATING NICKEL AMMONIUM SULFATE IN THE AMMONIUM SULFATE SOLUTION; AND SEPARATING THE SOLUTION THEREFROM TO RECOVER NICKEL AMMONIUM SULFATE CRYSTALS.
Claim 2
Dependent Claim
89 words
THE PROCESS FOR THE PRODUCTION OF NICKEL AMMONIUM SULFATE WHICH COMPRISES REACTING OXIDIC NICKEL ORE WITH AMMONIUM SULFATE AT ELEVATED TEMPERATURES OF ABOUT 400 DEGREES CENTIGRADE, TREATING THE REACTION PRODUCT SO FORMED WITH AN AQUEOUS SOLUTION OF AMMONIUM HYDROXIDE AND AMMONIUM CARBONATE, SEPARATING THE INSOLUBLE SUBSTANCES AND THE MOTHER LIQUOR WHEREBY THE NICKEL VALUES ARE CONVERTED TO NICKEL AMMONIA SULFATE IN SOLUTION WITH AMMONIUM SULFATE; EVAPORATING SAID SOLUTION THEREBY PRECIPITATING NICKEL AMMONIUM SULFATE IN THE AMMONIUM SULFATE SOLUTION; AND SEPARATING THE SOLUTION THEREFROM TO RECOVER NICKEL AMMONIUM SULFATE CRYSTALS.
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) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |