US2901496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salicylate process for thorium separation from rare earths
Assignee: Individual
•
Filing: 1949-09-09
•
Granted: 1959-08-25
•
Expires: 1969-09-09
Abstract
No abstract record available.
Inventors
- 👤 George A Cowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:31
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0291
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE SEPARATION OF THORIUM FROM AQUEOUS SOLUTIONS CONTAINING SALTS OF THORIUM AND RARE EARTHS AND SUFFICIENT ACETATE BUFFER TO EFFECT A PH OF BETWEEN 2 AND 5. WHICH COMPRISES ADDING AN AMMONIUM SALICYLATE TO SAID AQUEOUS BUFFERED SOLUTION, CONTACTING THE RESULTANT SOLUTION WITH A SUBSTANTIALLY WATER-IMMISCIBLE ORGANIC SOLVENT MIXTURE OF AN ESTER AND AN ESTER AND SEPARATING A SOLVENT EXTRACT PHASE CONTAINING A THORIUM SALICYLATE FROM THE AQUEOUS PHASE CONTAINING THE RARE EARTHS.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE SEPARATION OF THORIUM FROM AQUEOUS SOLUTIONS CONTAINING SALTS OF THORIUM AND RARE EARTHS AND SUFFICIENT ACETATE BUFFER TO EFFECT A PH OF BETWEEN 2 AND 5. WHICH COMPRISES ADDING AN AMMONIUM SALICYLATE TO SAID AQUEOUS BUFFERED SOLUTION, CONTACTING THE RESULTANT SOLUTION WITH A SUBSTANTIALLY WATER-IMMISCIBLE ORGANIC SOLVENT MIXTURE OF AN ESTER AND AN ESTER AND SEPARATING A SOLVENT EXTRACT PHASE CONTAINING A THORIUM SALICYLATE FROM THE AQUEOUS PHASE CONTAINING THE RARE EARTHS.
References Cited (Backward Citations)
US1933520A
Cited
US2227833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |