US2864765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dewatering ore concentrates
Assignee: Huntington Alloys Corp
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Filing: 1954-02-01
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Granted: 1958-12-16
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Expires: 1974-02-01
Abstract
No abstract record available.
Inventors
- 👤 Stoneman Earl George
- 👤 Frame George Archibald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:55
CPC Classifications
B; B03; B03D; B03D3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN A PROCESS OF TREATING ORE CONCENTRATES WHEREIN THERE IS ESTABLISHED AN AQUEOUS SLURRY OF ORE CONCENTRATES WHICH IS SUBSEQUENTLY SUBJECTED TO A FILTRATION OPERATION TO FORM A FILTER CAKE, THE IMPROVED METHOD OF DEWATERING THE ORE CONCENTRATES TO PROVIDE A FILTER CAKE WHICH IS FRIABLE AND EASILY HANDLED BY CONVENTIONAL METHODS OF MATERIALS HANDLING WHICH COMPRISES ESTABLISHING AN AQUEOUS SLURRY OF ORE CONCENTRATES HAVING A PARTICLE SIZE OF UP TO 300 MICRONS, INCORPORATING INTO SAID AQUEOUS SLURRY PRIOR TO FILTRATION A POLYOXYETHYLENE ETHER OF A HEXITOL ANHYDRIDE PARTIAL LONG CHAIN FATTY ACID ESTER HAVING A HYDROPHILE-LIPOPHILE BALANCE OF NOT MORE THAN ABOUT 11 IN A SMALL BUT EFFECTIVE AMOUNT UP TO ABOUT 0.5% BY WEIGHT OF ORE CONCENTRATES TO THEREBY FORM ON FILTRATION A FILTER CAKE WHICH HAS BETTER HANDLING CHARACTERISTICS AND WHICH IS FURTHER CHARACTERIZED BY FRIABILITY AND A SUBSTANTIALLY LOWER PORPORTION OF WATER AS COMPARED TO THE FILTER CAKE FORMED WHEN SAID ETHER IS NOT ADDED.
Claim 2
Dependent Claim
159 words
IN A PROCESS OF TREATING ORE CONCENTRATES WHEREIN THERE IS ESTABLISHED AN AQUEOUS SLURRY OF ORE CONCENTRATES WHICH IS SUBSEQUENTLY SUBJECTED TO A FILTRATION OPERATION TO FORM A FILTER CAKE, THE IMPROVED METHOD OF DEWATERING THE ORE CONCENTRATES TO PROVIDE A FILTER CAKE WHICH IS FRIABLE AND EASILY HANDLED BY CONVENTIONAL METHODS OF MATERIALS HANDLING WHICH COMPRISES ESTABLISHING AN AQUEOUS SLURRY OF ORE CONCENTRATES HAVING A PARTICLE SIZE OF UP TO 300 MICRONS, INCORPORATING INTO SAID AQUEOUS SLURRY PRIOR TO FILTRATION A POLYOXYETHYLENE ETHER OF A HEXITOL ANHYDRIDE PARTIAL LONG CHAIN FATTY ACID ESTER HAVING A HYDROPHILE-LIPOPHILE BALANCE OF NOT MORE THAN ABOUT 11 IN A SMALL BUT EFFECTIVE AMOUNT UP TO ABOUT 0.5% BY WEIGHT OF ORE CONCENTRATES TO THEREBY FORM ON FILTRATION A FILTER CAKE WHICH HAS BETTER HANDLING CHARACTERISTICS AND WHICH IS FURTHER CHARACTERIZED BY FRIABILITY AND A SUBSTANTIALLY LOWER PORPORTION OF WATER AS COMPARED TO THE FILTER CAKE FORMED WHEN SAID ETHER IS NOT ADDED.
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) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |