US3013859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of scandium values from iron values by solvent extraction
Assignee: Individual
•
Filing: 1958-07-15
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Granted: 1961-12-19
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Expires: 1978-07-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl William Kuhlman
- 👤 Gerhard P Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:30
CPC Classifications
C; C01; C01F; C01F17/00; C01F17/10; C01F17/17; C01F17/20; C01F17/206; C01F17/212
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS OF SEPARATING SCANDIUM VALUES FROM TRIVALENT IRON VALUES BY CONTACT OF AN AQUEOUS NITRIC ACID MEDIUM WITH A SUBSTANTIALLY WATER-IMMISICIBLE ALKYL PHOSPHATE MEDIUM, ONE OF SAID MEDIA CONTAINING SAID SCANDIUM VALUES AND SAID IRON VALUES, CONSISTING OF ADDING MAGNESIUM NITRATE TO SAID AQUEOUS MEDIUM IN AN AMOUNT TO OBTAIN A CONCENTRATION OF AT LEAST 2.5 LBS./GAL., CONTACTING SAID AQUEOUS MEDIUM WITH SAID ALKYL PHOSPHATE MEDIUM WHEREBY THE IRON VALUES ARE TAKEN UP BY AN AQUEOUS PHASE WHILE THE SCANDIUM VALUES ARE HELD BY AN ALKYL PHOSPHATE PHASE, AND SEPARATING SAID AQUEOUS PHASE FROM SAID ALKYL PHOSPHATE PHASE.
Claim 2
Dependent Claim
99 words
A PROCESS OF SEPARATING SCANDIUM VALUES FROM TRIVALENT IRON VALUES BY CONTACT OF AN AQUEOUS NITRIC ACID MEDIUM WITH A SUBSTANTIALLY WATER-IMMISICIBLE ALKYL PHOSPHATE MEDIUM, ONE OF SAID MEDIA CONTAINING SAID SCANDIUM VALUES AND SAID IRON VALUES, CONSISTING OF ADDING MAGNESIUM NITRATE TO SAID AQUEOUS MEDIUM IN AN AMOUNT TO OBTAIN A CONCENTRATION OF AT LEAST 2.5 LBS./GAL., CONTACTING SAID AQUEOUS MEDIUM WITH SAID ALKYL PHOSPHATE MEDIUM WHEREBY THE IRON VALUES ARE TAKEN UP BY AN AQUEOUS PHASE WHILE THE SCANDIUM VALUES ARE HELD BY AN ALKYL PHOSPHATE PHASE, AND SEPARATING SAID AQUEOUS PHASE FROM SAID ALKYL PHOSPHATE 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) | 1964-12-18 | 1965-06-19 | 1965-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-18 | 1969-06-19 | 1969-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-18 | 1973-06-19 | 1973-12-19 | $7700.00 | Window Closed / Lapsed |