Patent US6334059B1 successfully refreshed from Google Patents.
US2835552A
Expired / Lapsed
US
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Solvent extraction process for the recovery of uranium values from aqueous solutions
Assignee: Individual
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Filing: 1952-12-08
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Granted: 1958-05-20
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Expires: 1972-12-08
Abstract
No abstract record available.
Inventors
- 👤 William J Mcginnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:03
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/026
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
IN A PROCESS OF RECOVERING URANIUM VALUES FROM AQUEOUS SOLUTION CONTAINING TETRAVALENT URANIUM VALUES BY LIQUID-LIQUID EXTRACTION WITH AN ORGANIC SOLVENT CONTAINING AN ALKYL ACID ESTER OF A PHOSPHORIC ACID SELECTED FROM THE GROUP CONSISTING OF ORTHOPHOSPHORIC ACID AND PYROPHOSPHORIC ACID, THE STEPS COMPRISING SEPARATING THE URANIUM-RICH ORGANIC SOLVENT FROM THE CONTACTED AQUEOUS SOLUTION, TREATING THE RICH ORGANIC SOLVENT WITH AN AQUEOUS MIXTURE OF PHOSPHORIC ACID AND HYDROFLUORIC ACID TO PRECIPITATE THE URANIUM, SEPARATING THE AQUEOUS ACID PHASE FROM THE ORGANIC PHASE, RETURNING THE ORGANIC PHASE TO THE EXTRACTION SYSTEM AND SEPARATELY RECOVERING THE URANIUM PRECIPITATE AND THE AQUEOUS ACID MIXTURE.
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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |