US2669355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation method and reagent
Assignee: United States Steel Corp
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Filing: 1950-07-05
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Granted: 1954-02-16
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Expires: 1970-07-05
Abstract
No abstract record available.
Inventors
- 👤 Frederick R Archibald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:09
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/018; B03D1/002; B03D1/004; B03D1/008; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A METHOD FOR FLOATING IRON OXIDE MINERALS FROM SILICIOUS MINERALS COMPRISING ADDING TO AN ORE PULP, WHICH CONTAINS ABOUT 10 TO 85% SOLIDS BY WEIGHT, ABOUT 0.5 TO 5.0 POUNDS OF A COLLECTOR OF THE FATTY ACID TYPE PER LONG TON OF SOLIDS IN THE PULP AND ABOUT 0.2 TO 3.0 POUNDS OF COLLOIDAL SILICA ON AN ANHYDROUS BASIS PER LONG TON OF SOLIDS, THE COLLECTOR BEING OF THE GROUP WHICH CONSISTS OF HIGHER FATTY ACIDS, ESTERS OF THE HIGHER FATTY ACIDS, RESIN ACIDS, NAPHTHENIC ACIDS AND MIXTURES OF THE FOREGOING, BUT BEING SUBSTANTIALLY FREE OF ALKALI METAL IONS THE COLLOIDAL SILICA HAVING A MOL RATIO OF SILICA TO ALKALI METALS OF AT LEAST 25 TO 1, AND SUBJECTING THE PULP TO A FLOATION TREATMENT.
Claim 2
Independent Claim
125 words
A METHOD FOR FLOATING IRON OXIDE MINERALS FROM SILICIOUS MINERALS COMPRISING ADDING TO AN ORE PULP, WHICH CONTAINS ABOUT 10 TO 85% SOLIDS BY WEIGHT, ABOUT 0.5 TO 5.0 POUNDS OF A COLLECTOR OF THE FATTY ACID TYPE PER LONG TON OF SOLIDS IN THE PULP AND ABOUT 0.2 TO 3.0 POUNDS OF COLLOIDAL SILICA ON AN ANHYDROUS BASIS PER LONG TON OF SOLIDS, THE COLLECTOR BEING OF THE GROUP WHICH CONSISTS OF HIGHER FATTY ACIDS, ESTERS OF THE HIGHER FATTY ACIDS, RESIN ACIDS, NAPHTHENIC ACIDS AND MIXTURES OF THE FOREGOING, BUT BEING SUBSTANTIALLY FREE OF ALKALI METAL IONS THE COLLOIDAL SILICA HAVING A MOL RATIO OF SILICA TO ALKALI METALS OF AT LEAST 25 TO 1, AND SUBJECTING THE PULP TO A FLOATION TREATMENT.
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) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |