US2952640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cesium recovery from aqueous solutions
Assignee: Individual
•
Filing: 1957-11-14
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Granted: 1960-09-13
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Expires: 1977-11-14
Abstract
No abstract record available.
Inventors
- 👤 Charles A Goodall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:00
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/10; G; G21; G21F; G21F9/00; G21F9/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS OF REMOVING CESIUM VALUES FROM AQUEOUS SOLUTIONS CONTAINING A MINERAL ACID SALT OF CESIUM, COMPRISING ADJUSTING THE ACIDITY OF THE SOLUTION TO FROM 0.2 N MINERAL ACID TO 0.61 N ACID-DEFICIENCY, ADDING A WATERSOLUBLE ZINC SALT AND A WATER-SOLUBLE FERRICYANIDE TO THE SOLUTION IN A QUANITY TO OBTAIN A ZINC FERRICYANIDE PRECIPITATE CORRESPONDING TO A CONCENTRATION OF AT LEAST 0.0004 M, AND SEPARATING THE PRECIPITATE CARRYING SAID CESIUM VALUES FROM THE AQUEOUS SOLUTION.
Claim 2
Dependent Claim
75 words
A PROCESS OF REMOVING CESIUM VALUES FROM AQUEOUS SOLUTIONS CONTAINING A MINERAL ACID SALT OF CESIUM, COMPRISING ADJUSTING THE ACIDITY OF THE SOLUTION TO FROM 0.2 N MINERAL ACID TO 0.61 N ACID-DEFICIENCY, ADDING A WATERSOLUBLE ZINC SALT AND A WATER-SOLUBLE FERRICYANIDE TO THE SOLUTION IN A QUANITY TO OBTAIN A ZINC FERRICYANIDE PRECIPITATE CORRESPONDING TO A CONCENTRATION OF AT LEAST 0.0004 M, AND SEPARATING THE PRECIPITATE CARRYING SAID CESIUM VALUES FROM THE AQUEOUS SOLUTION.
References Cited (Backward Citations)
US2811415A
Cited
US2769780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |