US2738253A
Expired / Lapsed
US
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Uranium separation process
Assignee: Eldorado Mining and Refining Ltd
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Filing: 1953-08-10
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Granted: 1956-03-13
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Expires: 1973-08-10
Abstract
No abstract record available.
Inventors
- 👤 Thunaes Arvid
- 👤 Brown Ernest Arthur
- 👤 Smith Harold William
- 👤 Brannen John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:22
CPC Classifications
C; C01; C01G; C01G43/00; C01G49/00; 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
72 words
A PROCESS FOR DISSOLVING URANIUM FROM ORES CONTAINING FERROUS IRON MINERALS AND TETRAVALENT URANIUM IN WHICH URANIUM IS BROUGHT INTO SOLUTION BY AGITATING THE ORE WITH COLD DILUTE SULPHURIC ACID SUFFICIENT TO MAINTAIN A HIGHLY ACID REACTION CONDITION OF A PH OF LESS THAN 2.1 IN THE PRESENCE OF SODIUM CHLORATE IN AN AMOUNT SUFFICIENT TO OXIDIZE SUBSTANTIALLY ALL FERROUS IRON OF FERRIC AND TO CONVERT SUBSTANTIALLY ALL TETRAVALENT URANIUM TO HEXA-
Claim 2
Dependent Claim
72 words
A PROCESS FOR DISSOLVING URANIUM FROM ORES CONTAINING FERROUS IRON MINERALS AND TETRAVALENT URANIUM IN WHICH URANIUM IS BROUGHT INTO SOLUTION BY AGITATING THE ORE WITH COLD DILUTE SULPHURIC ACID SUFFICIENT TO MAINTAIN A HIGHLY ACID REACTION CONDITION OF A PH OF LESS THAN 2.1 IN THE PRESENCE OF SODIUM CHLORATE IN AN AMOUNT SUFFICIENT TO OXIDIZE SUBSTANTIALLY ALL FERROUS IRON OF FERRIC AND TO CONVERT SUBSTANTIALLY ALL TETRAVALENT URANIUM TO HEXA-
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) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |