US2919802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of concentrating ores
Assignee: Viridian Inc Canada
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Filing: 1956-07-18
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Granted: 1960-01-05
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Expires: 1976-07-18
Abstract
No abstract record available.
Inventors
- 👤 Reginald T N Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:14
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B03D2201/00; B03D2201/06; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN A METHOD OF SEPARATING VALUABLE CONSTITUENTS FROM METAL BEARING SULPHIDE ORES WHICH CONTAIN SLIME FORMING CONSTITUENTS, THE IMPROVEMENT WHICH COMPRISES SUBJECTING A METAL BEARING SULPHIDE ORE PULP TO FROTH FLOTATION IN THE PRESENCE OF A MINERAL COLLECTOR, A FINITE AMOUNT OF MANNOGALACTAN AS A DEPRESSANT FOR SLIMES AND A FINITE AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL PHOSPHATES AND ALKALI METAL SILICATES AS A DISPERSANT FOR SAID SLIMES, SAID DISPERSANT HAVING BEEN ADDED TO THE ORE PULP PRIOR TO THE ADDITION OF THE MANNOGALACTAN.
Claim 2
Dependent Claim
90 words
IN A METHOD OF SEPARATING VALUABLE CONSTITUENTS FROM METAL BEARING SULPHIDE ORES WHICH CONTAIN SLIME FORMING CONSTITUENTS, THE IMPROVEMENT WHICH COMPRISES SUBJECTING A METAL BEARING SULPHIDE ORE PULP TO FROTH FLOTATION IN THE PRESENCE OF A MINERAL COLLECTOR, A FINITE AMOUNT OF MANNOGALACTAN AS A DEPRESSANT FOR SLIMES AND A FINITE AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL PHOSPHATES AND ALKALI METAL SILICATES AS A DISPERSANT FOR SAID SLIMES, SAID DISPERSANT HAVING BEEN ADDED TO THE ORE PULP PRIOR TO THE ADDITION OF THE MANNOGALACTAN.
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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |