US2990958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Froth flotation method
Assignee: Minerals and Chemicals Philipp Corp
•
Filing: 1958-12-09
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Granted: 1961-07-04
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Expires: 1978-12-09
Abstract
No abstract record available.
Inventors
- 👤 Ernest W Greene
- 👤 James B Duke
- 👤 Joseph L Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:13
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D1/008; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE METHOD FOR BENEFICIATING A VERY FINELY DIVIDED MULTICOMPONENT MINERAL MASS INCLUDING LIBERATED COMPONENTS WHICH COMPRISES CONDITIONING SAID MASS FOR FROTH FLOTATION WITH (1) A REAGENT CAPABLE OF SELECTIVELY OILING AT LEAST ONE COMPONENT OF SAID MASS, AND (2) COLLECTORCOATED AUXILIARY MINERAL PARTICLES CHARACTERIZED FURTHER BY BEING FLOATABLE IN THE PRESENCE OF AN AQUEOUS PULP OF SAID REAGENTIZED MASS, AND SUBJECTING THE THUS CONDITIONED MASS IN THE FORM OF AN AQUEOUS PULP THEREOF TO FROTH FLOTATION THEREBY TO PRODUCE A FROTH PRODUCT WHICH IS A CONCENTRATE OF OILED COMPONENTS OF SAID MASS IN INTIMATE ASSOCIATION WITH SAID AUXILIARY MINERAL PARTICLES AND A MACHINE DISCHARGE PRODUCT.
Claim 2
Independent Claim
105 words
THE METHOD FOR BENEFICIATING A VERY FINELY DIVIDED MULTICOMPONENT MINERAL MASS INCLUDING LIBERATED COMPONENTS WHICH COMPRISES CONDITIONING SAID MASS FOR FROTH FLOTATION WITH (1) A REAGENT CAPABLE OF SELECTIVELY OILING AT LEAST ONE COMPONENT OF SAID MASS, AND (2) COLLECTORCOATED AUXILIARY MINERAL PARTICLES CHARACTERIZED FURTHER BY BEING FLOATABLE IN THE PRESENCE OF AN AQUEOUS PULP OF SAID REAGENTIZED MASS, AND SUBJECTING THE THUS CONDITIONED MASS IN THE FORM OF AN AQUEOUS PULP THEREOF TO FROTH FLOTATION THEREBY TO PRODUCE A FROTH PRODUCT WHICH IS A CONCENTRATE OF OILED COMPONENTS OF SAID MASS IN INTIMATE ASSOCIATION WITH SAID AUXILIARY MINERAL PARTICLES AND A MACHINE DISCHARGE PRODUCT.
References Cited (Backward Citations)
US2569680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |