US3595390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ore flotation process with poly(ethylene-propylene)glycol frothers
Assignee: Wyeth Holdings LLC
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Filing: 1968-06-18
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Granted: 1971-07-27
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Expires: 1988-06-18
Abstract
Abstract A process for collecting mineral values from an ore which comprises mixing ground ore with water to form an ore pulp, aerating said pulp in the presence of an effective amount of frother selected from the group consisting of poly(ethylenepropylene) glycols and lower alkyl monoethers of poly(ethylenepropylene) glycols having an average molecular weight in the range of about 150 to about 2,500, each of said frothers being prepared from ethylene oxide and propylene oxide, each of said oxides being employed in amounts of between 5 and 95 mole percent based upon the amount of alkylene oxide reacted and recovering mineral values from the resulting froth.
Inventors
- 👤 Robert Ben Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:34
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D1/0043; B03D2201/00; B03D2201/02; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
16 words
The process of claim 1 wherein the frother is employed in combination with a mineral collector.
References Cited (Backward Citations)
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US2677700A
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US2965678A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |