US2963363A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium carbonate recovery
Assignee: Union Carbide Corp
•
Filing: 1957-12-09
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Granted: 1960-12-06
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Expires: 1977-12-09
Abstract
No abstract record available.
Inventors
- 👤 Roger L Pilloton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:57
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/22; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
THE RECOVERY OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUPS VB AND VIB OF THE PERIODIC TABLE FROM AN ORE BY LEACHING THE ORE WITH AN EXCESS OF A SODIUM CARBONATE SOLUTION WHEREBY THE VALUES OF SAID SELECTED METAL ARE DISSOLVED IN THE LEACH LIQUOR AS A SODIUM SALT OF A WEAK ACID OF SAID SELECTED METAL, THE IMPROVEMENT WHICH COMPRISES ADJUSTING THE PH OF SAID LEACH LIQUOR TO AT LEAST ABOUT 12, COOLING SAID LEACH LIQUOR TO A TEMPERATURE BELOW THE WATER-SODIUM CARBONATE DECAHYDRATE BINARY EUTECTIC TEMPERATURE AND ABOVE THE TERNARY INVARIANT POINT TEMPERATURE OF SAID LEACH LIQUOR WHEREBY SODIUM CARBONATE DECAHYDRATE IS CRYSTALLIZED FROM SOLUTION WITHOUT SUBSTANTIAL CRYSTALLIZATION OF THE SODIUM SALT OF THE WEAK ACID OF THE METAL VALUES, AND SEPARATING THE RESULTING PRECIPITATE FROM THE LEACH LIQUOR.
Claim 2
Dependent Claim
137 words
THE RECOVERY OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUPS VB AND VIB OF THE PERIODIC TABLE FROM AN ORE BY LEACHING THE ORE WITH AN EXCESS OF A SODIUM CARBONATE SOLUTION WHEREBY THE VALUES OF SAID SELECTED METAL ARE DISSOLVED IN THE LEACH LIQUOR AS A SODIUM SALT OF A WEAK ACID OF SAID SELECTED METAL, THE IMPROVEMENT WHICH COMPRISES ADJUSTING THE PH OF SAID LEACH LIQUOR TO AT LEAST ABOUT 12, COOLING SAID LEACH LIQUOR TO A TEMPERATURE BELOW THE WATER-SODIUM CARBONATE DECAHYDRATE BINARY EUTECTIC TEMPERATURE AND ABOVE THE TERNARY INVARIANT POINT TEMPERATURE OF SAID LEACH LIQUOR WHEREBY SODIUM CARBONATE DECAHYDRATE IS CRYSTALLIZED FROM SOLUTION WITHOUT SUBSTANTIAL CRYSTALLIZATION OF THE SODIUM SALT OF THE WEAK ACID OF THE METAL VALUES, AND SEPARATING THE RESULTING PRECIPITATE FROM THE LEACH LIQUOR.
References Cited (Backward Citations)
CA457964A
Cited
US1869621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |