US2824783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of scandium from aqueous solutions
Assignee: Individual
•
Filing: 1953-02-27
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Granted: 1958-02-25
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Expires: 1973-02-27
Abstract
No abstract record available.
Inventors
- 👤 Donald F Peppard
- 👤 Elliot S Nachtman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:16
CPC Classifications
C; C01; C01F; C01F17/00; C01F17/20; C01F17/253; C01F17/271; C01F17/10; C01F17/17; C01F17/276; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/38; C22B3/384; C22B3/3846; C22B59/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
THE PROCESS OF SEPARATING SCANDIUM VALUES FROM AQUEOUS MINERAL ACID SOLUTIONS WHICH COMPRISES CONTACTING AN AQUEOUS ACIDIC SOLUTION CONTAINING SAID SCANDIUM VALUES AND MINERAL ACID IN A CONCENTRATION OF BETWEEN 6 AND 8 M WITH TRIBUTYL PHOSPHATE, AND SEPARATING AN AQUEOUS PHASE AND AN EXTRACT PHASE CONTAINING SAID SCANDIUM VALUES.
Claim 2
Dependent Claim
50 words
THE PROCESS OF SEPARATING SCANDIUM VALUES FROM AQUEOUS MINERAL ACID SOLUTIONS WHICH COMPRISES CONTACTING AN AQUEOUS ACIDIC SOLUTION CONTAINING SAID SCANDIUM VALUES AND MINERAL ACID IN A CONCENTRATION OF BETWEEN 6 AND 8 M WITH TRIBUTYL PHOSPHATE, AND SEPARATING AN AQUEOUS PHASE AND AN EXTRACT PHASE CONTAINING SAID SCANDIUM VALUES.
References Cited (Backward Citations)
US2227833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |