Patent US3131993A successfully refreshed from Google Patents.
US3131993A
Expired / Lapsed
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Solvent extraction process for the recovery of vanadium from solutions
Assignee: Union Carbide Corp
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Filing: 1956-02-24
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Granted: 1964-05-05
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Expires: 1976-02-24
Abstract
No abstract record available.
Inventors
- 👤 Robert A Gustison
- 👤 Frank W Hurd
- 👤 Robert M Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:51
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A PROCESS FOR RECOVERING VANADIUM VALUES FROM ACIDIC AQUEOUS SOLUTION COMPRISING SOLVENT EXTRACTING AN ACIDIC AQUEOUS SOLUTION CONTAINING TETRAVALENT VANADIUM HAVING A PH OF ABOUT 2 WITH AN EXTRACTANT COMPRISING A SOLUTION OF DI-2-ETHYL HEXYL HYDROGEN PHOSPHATE IN A SUBSTANTIALLY WATER IMMISCIBLE INERT ORGANIC LIQUID CARRIER AND SEPARATING THE RESULTING VANADIUM CONTAINING EXTRACTANT FROM THE SOLVENT EXTRACTED AQUEOUS SOLUTION.
References Cited (Backward Citations)
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US2211119A
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US2202525A
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US2227833A
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US2796320A
Cited
US2859092A
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US2860031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |