US2507012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Froth flotation beneficiating material containing dolomite or magnesite
Assignee: Separation Process Co
•
Filing: 1947-02-25
•
Granted: 1950-05-09
•
Expires: 1967-02-25
Abstract
No abstract record available.
Inventors
- 👤 Heilmann Thorbjorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:26
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A METHOD FOR BENEFICIATING BY FROTH FLOTATION A MATERIAL CONTAINING CALCIUM CARBONATE AND A SUBSTANTIALLY LESS BUT AN UNDESIRED HIGH PROPORTION OF A MAGNESIUM CARBONATE MINERAL OF THE CLASS CONSISTING OF MAGNESITE AND DOLOMITE, WHICH COMPRISES SEPARATING FROM THE MATERIAL A FRACTION CONTAINING A MAJOR PORTION OF ALL THE PARTICLES PRESENT THEREIN HAVING A SIZE BELOW ABUT 10 MICRONS, INCREASING THE ALKALINITY OF AN AQUEOUS PULP OF THE MATERIAL ABOVE ABOUT 10 MICRONS IN SIZE A PH VALUE IN EXCESS OF 8.5 BY THE ADDITION OF AT LEAST ONE ALKALINE MATERIAL SELECTED FROM THE CLASS CONSISTING OF THE OXIDES, HYDROXIDES AND SOLUBLE BICARBONATES OF THE ALKALI AND ALKALINE EARTH METALS, SUBJECTING THE ALKALIZED PULP OF SAID MATERIAL IN THE PRESENCE OF A SOLUBLE SILICATE TO THE ACTION OF AT LEAST ONE ANIONIC COLLECTOR FOR OXIDIZED MINERALS SELECTED FROM THE CLASS CONSISTING OF THE HIGHER FATTY ACIDS, RESINOUS ACIDS, AND ALKALI METAL SOAPS THEREOF, AERATING THE PULP, AND REMOVING THE MAGNESIUM CARBONATE MINERAL AS A FROTH CONCENTRATE.
Claim 2
Independent Claim
166 words
A METHOD FOR BENEFICIATING BY FROTH FLOTATION A MATERIAL CONTAINING CALCIUM CARBONATE AND A SUBSTANTIALLY LESS BUT AN UNDESIRED HIGH PROPORTION OF A MAGNESIUM CARBONATE MINERAL OF THE CLASS CONSISTING OF MAGNESITE AND DOLOMITE, WHICH COMPRISES SEPARATING FROM THE MATERIAL A FRACTION CONTAINING A MAJOR PORTION OF ALL THE PARTICLES PRESENT THEREIN HAVING A SIZE BELOW ABUT 10 MICRONS, INCREASING THE ALKALINITY OF AN AQUEOUS PULP OF THE MATERIAL ABOVE ABOUT 10 MICRONS IN SIZE A PH VALUE IN EXCESS OF 8.5 BY THE ADDITION OF AT LEAST ONE ALKALINE MATERIAL SELECTED FROM THE CLASS CONSISTING OF THE OXIDES, HYDROXIDES AND SOLUBLE BICARBONATES OF THE ALKALI AND ALKALINE EARTH METALS, SUBJECTING THE ALKALIZED PULP OF SAID MATERIAL IN THE PRESENCE OF A SOLUBLE SILICATE TO THE ACTION OF AT LEAST ONE ANIONIC COLLECTOR FOR OXIDIZED MINERALS SELECTED FROM THE CLASS CONSISTING OF THE HIGHER FATTY ACIDS, RESINOUS ACIDS, AND ALKALI METAL SOAPS THEREOF, AERATING THE PULP, AND REMOVING THE MAGNESIUM CARBONATE MINERAL AS A FROTH CONCENTRATE.
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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) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |