US2701057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of iron ores by froth flotation
Assignee: Individual
•
Filing: 1952-05-29
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Granted: 1955-02-01
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Expires: 1972-05-29
Abstract
No abstract record available.
Inventors
- 👤 Ballard H Clemmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:35
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B03D1/002; B03D1/008; B03D2201/00; B03D2201/005; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR SELECTIVELY ISOLATING THE CALCAREOUS CONSTITUENTS OF CALCAREOUS IRON ORES COMPRISING SUBJECTING AN ALKALINE PULP OF THE IRON ORE HAVING A PH AT LEAST AS HIGH AS ABOUT 9.3 TO FROTH FLOTATION WITH AN ANIONIC-COLLECTING AGENT SELECTED FROM THE CLASS CONSISTING OF HIGHER FATTY ACIDS, RESIN ACIDS, MIXTURES OF FATTY AND RESIN ACIDS, AND SOAPS THEREOF, AND RETARDING FLOTATION OF THE IRON OXIDES WITH WATER-SOLUBLE SILICATES IN AN AMOUNT PROVIDING AN IRON OXIDE DEPRESSING ACTION EQUIVALENT TO THAT OF FROM 2 TO 12 POUNDS OF SODIUM SILICATE SOLUTION OF 63 PER CENT WATER CONTENT PER TON OF ORE.
Claim 2
Dependent Claim
100 words
A PROCESS FOR SELECTIVELY ISOLATING THE CALCAREOUS CONSTITUENTS OF CALCAREOUS IRON ORES COMPRISING SUBJECTING AN ALKALINE PULP OF THE IRON ORE HAVING A PH AT LEAST AS HIGH AS ABOUT 9.3 TO FROTH FLOTATION WITH AN ANIONIC-COLLECTING AGENT SELECTED FROM THE CLASS CONSISTING OF HIGHER FATTY ACIDS, RESIN ACIDS, MIXTURES OF FATTY AND RESIN ACIDS, AND SOAPS THEREOF, AND RETARDING FLOTATION OF THE IRON OXIDES WITH WATER-SOLUBLE SILICATES IN AN AMOUNT PROVIDING AN IRON OXIDE DEPRESSING ACTION EQUIVALENT TO THAT OF FROM 2 TO 12 POUNDS OF SODIUM SILICATE SOLUTION OF 63 PER CENT WATER CONTENT PER TON OF ORE.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |