US2815262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation process for thorium salts
Assignee: Individual
•
Filing: 1952-06-24
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Granted: 1957-12-03
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Expires: 1972-06-24
Abstract
No abstract record available.
Inventors
- 👤 Grover L Bridger
- 👤 Marvin E Whatley
- 👤 Kernal G Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:12
CPC Classifications
C; C01; C01F; C01F15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR SEPARATING THORIUM VALUES FROM RARE EARTH VALUES CONTAINED IN PHOSPHATE PRECIPITATES OBTAINED FROM MONAZITE SAND SOLUTIONS, COMPRISING DISSOLVING THE PRECIPITATE IN A MIXTURE OF AQUEOUSNITRIC ACID AND FERRIC NITRATE, CONTACTING THE SOLUTION FORMED WITH A SUBSTANTIALLY WATER-IMMISCIBLE ALKYL PHOSPHATE WHEREBY THORIUM VALUES ARE PREFERENTIALLY TAKEN UP BY AN ORGANIC PHASE, WHILE THE RARE EARTH VALUES PREFERENTIALLY REMAIN IN THE AQUEOUS SOLUTION, AND SEPARATING AN ORGANIC EXTRACT PHASE FROM THE REMAINING SOLUTION.
Claim 2
Dependent Claim
74 words
A PROCESS FOR SEPARATING THORIUM VALUES FROM RARE EARTH VALUES CONTAINED IN PHOSPHATE PRECIPITATES OBTAINED FROM MONAZITE SAND SOLUTIONS, COMPRISING DISSOLVING THE PRECIPITATE IN A MIXTURE OF AQUEOUSNITRIC ACID AND FERRIC NITRATE, CONTACTING THE SOLUTION FORMED WITH A SUBSTANTIALLY WATER-IMMISCIBLE ALKYL PHOSPHATE WHEREBY THORIUM VALUES ARE PREFERENTIALLY TAKEN UP BY AN ORGANIC PHASE, WHILE THE RARE EARTH VALUES PREFERENTIALLY REMAIN IN THE AQUEOUS SOLUTION, AND SEPARATING AN ORGANIC EXTRACT PHASE FROM THE REMAINING 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) | 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 |