US2872288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonate method of separation of tetravalent plutonium from fission product values
Assignee: Individual
•
Filing: 1947-06-09
•
Granted: 1959-02-03
•
Expires: 1967-06-09
Abstract
No abstract record available.
Inventors
- 👤 Robert B Duffield
- 👤 Raymond W Stoughton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:12
CPC Classifications
C; C01; C01G; C01G56/00; C01G56/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF SEPARATING TETRAVALENT PLUTONIUM VALUES FROM LANTHANUM-GROUP RARE EARTH VALUES WHICH FORM CARBONATE INSOLUBLE IN A CARBONATE SOLUTION CONTAINED IN AN AQUEOUS ACID SOLUTION COMPRISING ADJUSTING THE PH VALUE OF SAID SOLUTION TO BETWEEN 5.5 AND 7.5,ADDING CARBONATE ANIONS TO SAID SOLUTION IN AN APPROXIMATELY STOICHIEMETRIC AMOUNT WITH REGARD TO PLUTONIUM AND RARE EARTHS PRESENT WHERE BY PU (IV) CARBONATE AND RARE EARTH CARBONATES PRECIPITATE, SEPARATING SAID CARBONATE PRECIPITATE FROM THE SOLUTION, CONTACTING SAID CARBONATEPRECIPITATE WITH AN AQUEOUS CARBONATE SOLUTION OF A CONCENTRATION OF BETWEEN 1 AND 3 M WHEREBY SAID PU (IV) CARBONATE IS DISSOLVED, AND SEPARATING SAID RARE EARTH CARBONATES-CONTAINING PRECIPITATE FROM SAID PLUTONIUM-CONTAINING SOLUTION.
Claim 2
Independent Claim
109 words
A METHOD OF SEPARATING TETRAVALENT PLUTONIUM VALUES FROM LANTHANUM-GROUP RARE EARTH VALUES WHICH FORM CARBONATE INSOLUBLE IN A CARBONATE SOLUTION CONTAINED IN AN AQUEOUS ACID SOLUTION COMPRISING ADJUSTING THE PH VALUE OF SAID SOLUTION TO BETWEEN 5.5 AND 7.5,ADDING CARBONATE ANIONS TO SAID SOLUTION IN AN APPROXIMATELY STOICHIEMETRIC AMOUNT WITH REGARD TO PLUTONIUM AND RARE EARTHS PRESENT WHERE BY PU (IV) CARBONATE AND RARE EARTH CARBONATES PRECIPITATE, SEPARATING SAID CARBONATE PRECIPITATE FROM THE SOLUTION, CONTACTING SAID CARBONATEPRECIPITATE WITH AN AQUEOUS CARBONATE SOLUTION OF A CONCENTRATION OF BETWEEN 1 AND 3 M WHEREBY SAID PU (IV) CARBONATE IS DISSOLVED, AND SEPARATING SAID RARE EARTH CARBONATES-CONTAINING PRECIPITATE FROM SAID PLUTONIUM-CONTAINING SOLUTION.
References Cited (Backward Citations)
US2768871A
Cited
US2767044A
Cited
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 |