Patent US2487746A successfully refreshed from Google Patents.
Patent US2796320A successfully refreshed from Google Patents.
US2796320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction process for purification of thorium
Assignee: Individual
•
Filing: 1947-04-08
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Granted: 1957-06-18
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Expires: 1967-04-08
Abstract
No abstract record available.
Inventors
- 👤 Spedding Frank Harold
- 👤 Kant Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:36
CPC Classifications
C; C01; C01F; C01F15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR THE SEPARATION OF THORIUM FROM AN AQUEOUS SOLUTION CONTAINING THORIUM NITRATE, WHICH COMPRISES ADDING TO SAID AQUEOUS SOLUTION AT LEAST ONE MATERIAL OF THE GROUP CONSISTING OF NITRIC ACID, SODIUM NITRATE, POTASSIUM NITRATE, LITHIUM NITRATE, AMMONIUM NITRATE, MAGNESIUM NITRATE CALCIUM NITRATE, STRONTIUM NITRATE, MANGANESE NITRATE, ALUMINUM NITRATEAND LANTHANUM NITRATE, CONTACTING THE RESULTING SOLUTION WITH A LIQUID ORGANIC SOLVENT WHICH IS SUBSTANTIALLY IMMISCIBLE WITH SAID SOLUTION, SAID SOLVENT CONTAINING AT LEAST ONE ATOM CAPABLE OF DONATING AN ELECTRON PAIR TO A COORDINATION BOND, AND SEPARATING THE RESULTANT EXTRACT PHASE CONTAINING THORIUM SALT AND RAFFINATE PHASE.
Claim 2
Dependent Claim
97 words
A PROCESS FOR THE SEPARATION OF THORIUM FROM AN AQUEOUS SOLUTION CONTAINING THORIUM NITRATE, WHICH COMPRISES ADDING TO SAID AQUEOUS SOLUTION AT LEAST ONE MATERIAL OF THE GROUP CONSISTING OF NITRIC ACID, SODIUM NITRATE, POTASSIUM NITRATE, LITHIUM NITRATE, AMMONIUM NITRATE, MAGNESIUM NITRATE CALCIUM NITRATE, STRONTIUM NITRATE, MANGANESE NITRATE, ALUMINUM NITRATEAND LANTHANUM NITRATE, CONTACTING THE RESULTING SOLUTION WITH A LIQUID ORGANIC SOLVENT WHICH IS SUBSTANTIALLY IMMISCIBLE WITH SAID SOLUTION, SAID SOLVENT CONTAINING AT LEAST ONE ATOM CAPABLE OF DONATING AN ELECTRON PAIR TO A COORDINATION BOND, AND SEPARATING THE RESULTANT EXTRACT PHASE CONTAINING THORIUM SALT AND RAFFINATE PHASE.
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) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |