Patent US3764274A successfully refreshed from Google Patents.
US3764274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vanadium extraction using mixture of alkyl phosphine oxides and fluorinated beta diketones
Assignee: Kerr McGee Corp
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Filing: 1971-11-22
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Granted: 1973-10-09
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Expires: 1991-11-22
Abstract
Abstract A METHOD FOR THE EXTRACTION OF VANADIUM FROM ACIDIC MIXTURES IS PROVIDED WHICH COMPRISES EXTRACTING THE VANADIUM WITH A NOVEL TWO COMPONENT EXTRACTANT MIXTURE CONTAINING, AS ONE COMPONENT, AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMINES AND PHOSPHINE OXIDES, AND AS THE COMPONENT, A FLUORIANTED B-DIKETONE. THE EXTRACTION IS EFFECTED IN A WATER-IMMISCIBLE OR GANIC SOLVENT, THE VANADIUM BEING COMPLEXED WITH THE NOVEL EXTRACTANT MIXTURE AND BEING EXTRACTED INTO THE ORGANIC PHASE.
Inventors
- 👤 M Lucid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:24
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/22; C01; C01G; C01G31/00; C01G31/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |