Patent US2825458A successfully refreshed from Google Patents.
US2825458A
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Process of concentrating ores by selective froth flotation
Assignee: Individual
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Filing: 1953-03-02
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Granted: 1958-03-04
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Expires: 1973-03-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward H Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:26
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/014; B03D1/002; B03D1/008; B03D2201/00; B03D2201/02; B03D2201/06; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
136 words
A PROCESS OF DIFFERENTIAL FROTH FLOTATION, COMPRISING SUBJECTING AN ORE PULP CONTAINING A CARBONATE MINERAL AND AN OXIDE MINERAL TO A FROTH FLOTATION OPERATION IN THE PRESENCE OF REAGENT PREPARED BY INTERMIXING A HYDRIDE OF PROSPHOROUS WITH AN AQUEOUS SOLUTION OF AN ORGANIC LIQUID SELECTED FROM THE GROUP CONSISTING OF AN ALCOHOL AND AN ESTER OF AN ALCOHOL, AND IN THE PRESENCE OF A NONSULPHYDRIC COLLECTOR; RECOVERING A FLOAT PRODUCT MADE UP OF SAID CARBONATE MINERAL; SUBJECTING THE SINK PRODUCT FROM SAID FLOTATION OPERATION TO A RE-FLOTATION OPERATION IN THE PRESENCE OF A REAGENT (OTHER THAN THE SAID REAGENT) SELECTED FROM THE GROUP CONSISTING OF A HYDRIDE OF PHOSPHOROUS AND AN ORGANIC PHOSPHINE CARRIED BY A HYDROCARBON VEHICLE, AND THE PRESENCE OF A NON-SULPHYDRIC COLLECTOR; AND RECOVERING A FLOAT PRODUCT MADE UP OF THE OXIDE MINERAL.
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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |