Patent US2551893A successfully refreshed from Google Patents.
US2551893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anionic flotation process for beneficiating iron ore
Assignee: Oliver Iron Mining Co
•
Filing: 1948-05-18
•
Granted: 1951-05-08
•
Expires: 1968-05-18
Abstract
No abstract record available.
Inventors
- 👤 Ronald J Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:58
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B03D1/008; B03D2201/00; B03D2201/02; B03D2201/06; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR SEPARATION OF SILICEOUS GANGUE FROM AN AQUEOUS PULP OF FINELY DIVIDED IRON ORE CONTAINING 10 TO 70 PERCENT SOLIDS COMPRISING MIXING WITH THE PULP 0.5 TO 4.0 POUNDS OF PORTLAND CEMENT PER TON OF FEED ORE, 1 TO 5 POUNDS PER TON OF FEED ORE OF AN ANION ACTIVE COLLECTOR OF THE GROUP CONSISTING OF RESIN ACIDS, HIGHER FATTY ACIDS, RESIN ACID SOAPS, HIGHER FATTY ACID SOAPS, AND MIXTURES OF THE FOREGOING, AND 0.5 TO 8.0 POUNDS PER TON OF FEED ORE OF SOLUBILIZED STARCH, ADJUSTING THE PH VALUE OF THE PULP TO 10.0 TO 12.0 AND SUBJECTING THE PULP THUS PREPARED TO FROTH FLOTATION.
Claim 2
Dependent Claim
108 words
A PROCESS FOR SEPARATION OF SILICEOUS GANGUE FROM AN AQUEOUS PULP OF FINELY DIVIDED IRON ORE CONTAINING 10 TO 70 PERCENT SOLIDS COMPRISING MIXING WITH THE PULP 0.5 TO 4.0 POUNDS OF PORTLAND CEMENT PER TON OF FEED ORE, 1 TO 5 POUNDS PER TON OF FEED ORE OF AN ANION ACTIVE COLLECTOR OF THE GROUP CONSISTING OF RESIN ACIDS, HIGHER FATTY ACIDS, RESIN ACID SOAPS, HIGHER FATTY ACID SOAPS, AND MIXTURES OF THE FOREGOING, AND 0.5 TO 8.0 POUNDS PER TON OF FEED ORE OF SOLUBILIZED STARCH, ADJUSTING THE PH VALUE OF THE PULP TO 10.0 TO 12.0 AND SUBJECTING THE PULP THUS PREPARED TO FROTH FLOTATION.
References Cited (Backward Citations)
US2364777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |