US2922522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering mineral values from ore
Assignee: International Minerals and Chemical Corp
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Filing: 1957-06-28
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Granted: 1960-01-26
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Expires: 1977-06-28
Abstract
No abstract record available.
Inventors
- 👤 Douglas H Fenske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:45
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/021; B03D1/001; B03D1/004; B03D1/008; B03D1/01; B03D1/06; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06; Y; Y10; Y10S; Y10S209/00; Y10S209/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A FLOTATION PROCESS WHEREIN A PHOSPHATE ORE CONTAINING SILICA AND HEAVY MINERALS IS SUBJECTED TO ANIONIC FLOTATION TO SEPARATE A FLOAT CONCENTRATE COMPRISING SILICA AND HEAVY MINERALS AND PREDOMINATING IN PHOSPHATE, AND THE SAID ANIONIC CONCENTRATE IS SUBJECTED TO CATIONIC FLOTATION TO SEPARATE A FLOAT CONCENTRATE CONTAINING PHOSPHATE AND HEAVY MINERALS AND PREDOMINATING IN SILICA, THE STEPS WHICH COMPRISING ADDING TO SAID CATIONIC FLOAT CONCENTRATE A HALOGEN SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE, HYPOCHLORITES, HYPOBROMITES AND MIXTURES THEREOF IN A PROPORTION EQUIVALENT TO BETWEEN ABOUT 0.05 AND ABOUT 1.5 POUNDS OF HALOGEN PER TON OF SOLIDS, AND SUBJECTING SAID CATIONIC FLOAT CONCENTRATE TO FURTHER FLOTATION WITHOUT FURTHER REAGENTIZING TO SEPARATE A FLOAT CONCENTRATE COMPRISING PREDOMINATELY PHOSPHATE AND HEAVY MINERALS.
Claim 2
Dependent Claim
123 words
IN A FLOTATION PROCESS WHEREIN A PHOSPHATE ORE CONTAINING SILICA AND HEAVY MINERALS IS SUBJECTED TO ANIONIC FLOTATION TO SEPARATE A FLOAT CONCENTRATE COMPRISING SILICA AND HEAVY MINERALS AND PREDOMINATING IN PHOSPHATE, AND THE SAID ANIONIC CONCENTRATE IS SUBJECTED TO CATIONIC FLOTATION TO SEPARATE A FLOAT CONCENTRATE CONTAINING PHOSPHATE AND HEAVY MINERALS AND PREDOMINATING IN SILICA, THE STEPS WHICH COMPRISING ADDING TO SAID CATIONIC FLOAT CONCENTRATE A HALOGEN SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE, HYPOCHLORITES, HYPOBROMITES AND MIXTURES THEREOF IN A PROPORTION EQUIVALENT TO BETWEEN ABOUT 0.05 AND ABOUT 1.5 POUNDS OF HALOGEN PER TON OF SOLIDS, AND SUBJECTING SAID CATIONIC FLOAT CONCENTRATE TO FURTHER FLOTATION WITHOUT FURTHER REAGENTIZING TO SEPARATE A FLOAT CONCENTRATE COMPRISING PREDOMINATELY PHOSPHATE AND HEAVY MINERALS.
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) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |