Patent US3780167A successfully refreshed from Google Patents.
US3780167A
Expired / Lapsed
US
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Process for solvent extraction of ores
Assignee: Individual
•
Filing: 1971-07-30
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Granted: 1973-12-18
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Expires: 1991-07-30
Abstract
Abstract A CONTINUOUS PROCESS FOR EXTRACTION OF VALUABLE MINERALS FROM A MINERAL-BEARING ORE BY A WATER-IMMISCIBLE SOLVENT WHICH HAS A DENSITY LESS THAN THAT OF WATER AND IN WHICH THE MINERAL IS SOLUBLE. FOLLOWING SOLVENT EXTRACTION OF THE MINERAL FROM THE ORE, WATER IS ADDED TO THE ORE-SOLVENT MIXTURE TO FLOCCULATE RESIDUAL GANGUE AND SEPARATE THE GANGUE FROM THE MINERAL-RICH SOLVENT PRIOR TO TREATMENT OF THE LATTER FOR SEPARATION OF THE MINERAL FROM THE SOLVENT.
Inventors
- 👤 H Wheeler
- 👤 W Lansdale
- 👤 F Wingate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:35
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/027; C01B17/033; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0253; B01D11/0257; B01D11/028
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |