Patent US3292780A successfully refreshed from Google Patents.
US3292780A
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Process for improved flotation treatment of iron ores by selective flocculation
Assignee: Individual
•
Filing: 1964-05-04
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Granted: 1966-12-20
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Expires: 1984-05-04
Abstract
No abstract record available.
Inventors
- 👤 Donald W Frommer
- 👤 Arthur F Colombo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:55
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06; B03D1/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR CONCENTRATION OF IRON ORES COMPRISING THE FOLLOWING SEQUENCE OF STEPS (1) INITIALLY FORMING A RELATIVELY STABLE AQUEOUS DISPERSION OF THE ORE, (2) TREATING THE DISPERSION OF ORE WITH A FLOCCULATING AGENT CAPABLE OF CAUSING SELECTIVE FLOCCULATION OF THE IRON OXIDES IN THE ORE IN PREFERENCE OF SILICIA MATERIAL, AND SELECTED FROM THE GROUP CONSISTING OF STARCHES, FLOURS, AND POLYACRYLAMIDES (3) ALLOWING FLOCCULATED IRON OXIDES TO SETTLE, (4) SEPARATING THE REMOVING THE SUSPENDED SILICA MATERIAL FROM THE FLOCCULATED IRON OXIDES AND (5) SUBSEQUENTIALLY SUBJECTING AN AQUEOUS PULP OF THE FLOCCULATED IRON OXIDES TO A FROTH FLOTATION OPERATION IN THE PRESENCE OF A COLLECTOR TO FURTHER SEPARATE IRON OXIDES FROM SILICEOUS MATERIALS.
Claim 2
Dependent Claim
113 words
A PROCESS FOR CONCENTRATION OF IRON ORES COMPRISING THE FOLLOWING SEQUENCE OF STEPS (1) INITIALLY FORMING A RELATIVELY STABLE AQUEOUS DISPERSION OF THE ORE, (2) TREATING THE DISPERSION OF ORE WITH A FLOCCULATING AGENT CAPABLE OF CAUSING SELECTIVE FLOCCULATION OF THE IRON OXIDES IN THE ORE IN PREFERENCE OF SILICIA MATERIAL, AND SELECTED FROM THE GROUP CONSISTING OF STARCHES, FLOURS, AND POLYACRYLAMIDES (3) ALLOWING FLOCCULATED IRON OXIDES TO SETTLE, (4) SEPARATING THE REMOVING THE SUSPENDED SILICA MATERIAL FROM THE FLOCCULATED IRON OXIDES AND (5) SUBSEQUENTIALLY SUBJECTING AN AQUEOUS PULP OF THE FLOCCULATED IRON OXIDES TO A FROTH FLOTATION OPERATION IN THE PRESENCE OF A COLLECTOR TO FURTHER SEPARATE IRON OXIDES FROM SILICEOUS MATERIALS.
References Cited (Backward Citations)
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US2217684A
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US2322201A
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US2381514A
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US2383467A
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US2660303A
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US2740522A
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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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |