Patent US2872287A successfully refreshed from Google Patents.
US2872287A
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Method of separating tetravalent plutonium values from cerium sub-group rare earth values
Assignee: Individual
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Filing: 1947-03-12
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Granted: 1959-02-03
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Expires: 1967-03-12
Abstract
No abstract record available.
Inventors
- 👤 Robert B Duffield
- 👤 Raymond W Stoughton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:54
CPC Classifications
C; C01; C01G; C01G56/00; C01G56/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF SEPARATING TETRAVALENT PLUTONIUM VALUES FROM RARE EARTH VALUES OF THE CERIUM SUB-GROUP CONTAINED IN AN AQUEOUS SOLUTION, COMPRISING ADDING TO SAID SOLUTION A COMPLEXING AGENT FOR PLUTONIUM SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATE AND URANYL NITRATE, ADDING ALKALI METAL CARBONATE AS A PRECIPITATING AGENT IN A QUANTITY TO OBTAIN A PH VALUE OF AT LEAST 5.5 SO THAT THE RARE EARTH VALUES PRECIPITATE WHILE THE PLUTONIUM VALUES REMAIN IN SOLUTION, AND SPARATING THE PRECIPITATE FORMED FROM THE SOLUTION.
Claim 2
Independent Claim
84 words
A METHOD OF SEPARATING TETRAVALENT PLUTONIUM VALUES FROM RARE EARTH VALUES OF THE CERIUM SUB-GROUP CONTAINED IN AN AQUEOUS SOLUTION, COMPRISING ADDING TO SAID SOLUTION A COMPLEXING AGENT FOR PLUTONIUM SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATE AND URANYL NITRATE, ADDING ALKALI METAL CARBONATE AS A PRECIPITATING AGENT IN A QUANTITY TO OBTAIN A PH VALUE OF AT LEAST 5.5 SO THAT THE RARE EARTH VALUES PRECIPITATE WHILE THE PLUTONIUM VALUES REMAIN IN SOLUTION, AND SPARATING THE PRECIPITATE FORMED FROM THE SOLUTION.
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) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |