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Patent US2815261A successfully refreshed from Google Patents.
US2815261A
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Uranium precipitation process
Assignee: Individual
•
Filing: 1951-05-01
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Granted: 1957-12-03
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Expires: 1971-05-01
Abstract
No abstract record available.
Inventors
- 👤 Thunaes Arvid
- 👤 Brown Ernest Arthur
- 👤 Smith Harold William
- 👤 Simard Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:07
CPC Classifications
C; C01; C01G; C01G43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR THE RECOVERY OF URANIUM FROM SULPHURIC ACID SOLUTIONS CONTAINING HEXAVALENT URANIUM AND OXIDIZING AGENTS IN WHICH THE SOLUTION IS TREATED WITH SULPHUR DIOXIDE TO EFFECT A PARTIAL REDUCTION OF THE OXIDIZING AGENTS AND TO LOWER THE PH OF THE SOLUTION, AND IN WHICH THE PH OF THE SOLUTION IS THEN ADJUSTED TO BETWEEN 1 AND 1.8 AND THE SOLUTION IS BROUGHT IN CONTACT WITH A SUFFICIENT QUANTITY OF A REDUCING AGENT COMPRISING ELEMENTAL ARSENIC, SUBSTANTIALLY TO COMPLETE THE REDUCTION OF OXIDIZING AGENTS IN THE SOLUTION AND OF HEXAVALENT URANIUM TO TETRAVALENT URANIUM.
Claim 2
Dependent Claim
95 words
A PROCESS FOR THE RECOVERY OF URANIUM FROM SULPHURIC ACID SOLUTIONS CONTAINING HEXAVALENT URANIUM AND OXIDIZING AGENTS IN WHICH THE SOLUTION IS TREATED WITH SULPHUR DIOXIDE TO EFFECT A PARTIAL REDUCTION OF THE OXIDIZING AGENTS AND TO LOWER THE PH OF THE SOLUTION, AND IN WHICH THE PH OF THE SOLUTION IS THEN ADJUSTED TO BETWEEN 1 AND 1.8 AND THE SOLUTION IS BROUGHT IN CONTACT WITH A SUFFICIENT QUANTITY OF A REDUCING AGENT COMPRISING ELEMENTAL ARSENIC, SUBSTANTIALLY TO COMPLETE THE REDUCTION OF OXIDIZING AGENTS IN THE SOLUTION AND OF HEXAVALENT URANIUM TO TETRAVALENT URANIUM.
References Cited (Backward Citations)
US890584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |