US2762685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of uranium and other metal values from sulfate solutions
Assignee: Ekstrand and Tholand Inc
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Filing: 1950-09-23
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Granted: 1956-09-11
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Expires: 1970-09-23
Abstract
No abstract record available.
Inventors
- 👤 Brundin Nils Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:47
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0221; C22B60/0226; C22B60/0234
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE METHOD OF RECOVERING URANIUM AS ITS SULPHATE, FROM AN AQUEOUS SOLUTION THEREOF ALONG WITH THE SULPHATES OF AT LEAST ONEOF THE METALS ALUMINUM, IRON, AND MAGNESIUM, WHICH METHOD COMPRISES, BEFORE REMOVING ANY ALUMINUM, IRON, AND MAGNESIUM ORIGINALLY CONTAINED IN THE SOLUTION, ADDING TO IT IN SOLID FORM AT LEAST ONE ALKALI SULPHATE AND DISSOLVING IT SOLELY IN THE WATER OF THE AQUEOUS SOLUTION, UNTIL ITS CONCENTRATION IS SO HIGH THAT THE AQUEOUS SOLUTION IS FROM NEARLY SATURATED TO SATURATED WITH THE ALKALI SULPHATE SO THAT AT LEAST SUBSTANTIALLY ALL OF THE ALUMINUM, IRON AND MAGNESIUM PRESENT IN THE SOLUTION CRYSTALLIZES OUT OF SOLUTION SIMULTANEOUSLY AS THE DOUBLE SULPHATE RESPECTIVELY OF EACH OF THESE LAST THREE METALS PRESENT WITH THE CATION OF THE ALKALI SULPHATE THUS
Claim 2
Independent Claim
126 words
THE METHOD OF RECOVERING URANIUM AS ITS SULPHATE, FROM AN AQUEOUS SOLUTION THEREOF ALONG WITH THE SULPHATES OF AT LEAST ONEOF THE METALS ALUMINUM, IRON, AND MAGNESIUM, WHICH METHOD COMPRISES, BEFORE REMOVING ANY ALUMINUM, IRON, AND MAGNESIUM ORIGINALLY CONTAINED IN THE SOLUTION, ADDING TO IT IN SOLID FORM AT LEAST ONE ALKALI SULPHATE AND DISSOLVING IT SOLELY IN THE WATER OF THE AQUEOUS SOLUTION, UNTIL ITS CONCENTRATION IS SO HIGH THAT THE AQUEOUS SOLUTION IS FROM NEARLY SATURATED TO SATURATED WITH THE ALKALI SULPHATE SO THAT AT LEAST SUBSTANTIALLY ALL OF THE ALUMINUM, IRON AND MAGNESIUM PRESENT IN THE SOLUTION CRYSTALLIZES OUT OF SOLUTION SIMULTANEOUSLY AS THE DOUBLE SULPHATE RESPECTIVELY OF EACH OF THESE LAST THREE METALS PRESENT WITH THE CATION OF THE ALKALI SULPHATE THUS
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) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |