US3687641A
Expired / Lapsed
US
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Separation and recovery of americium from curium and other elements
Assignee: United States Atomic Energy Commission
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Filing: 1971-03-09
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Granted: 1972-08-29
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Expires: 1991-03-09
Abstract
Abstract A METHOD IS PROVIDED FOR THE SEPARATION OF AMERICIUM FROM CURIUM DISSOLVED IN A DILUTE AQUEOUS SOLUTION OF NITRIC ACID WHICH COMPRISES SELECTIVELY OXIDIZING THE AMERICIUM TO THE +5 OXIDATION STATE, PASSING THE RESULTANT SOLUTION THROUGH A POROUS PACKED COLUMN OF CRYSTALLINE ZIRCONIUM PHOSPHATE, AND THEN SELECTIVELY ELUTING AN AMERICIUM-CONTAINING SOLUTION.
Inventors
- 👤 Fletcher L Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:51
CPC Classifications
C; C01; C01G; C01G56/00; C01G56/001; C01G56/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |