US2740522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of ores using addition polymers as depressants
Assignee: Wyeth Holdings LLC
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Filing: 1953-04-07
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Granted: 1956-04-03
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Expires: 1973-04-07
Abstract
No abstract record available.
Inventors
- 👤 Frank M Aimone
- 👤 Robert B Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:30
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B03D2201/00; B03D2201/02; B03D2201/06; B03D2203/00; B03D2203/02; Y; Y10; Y10S; Y10S209/00; Y10S209/901; Y10S210/00; Y10S210/902; Y10S210/906; Y10S210/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE METHOD OF CONCENTRATING ORES CONTAINING GANGUE SLIMES WHICH COMPRISES SUBJECTING AN AQUEOUS PULP OF SAID ORE TO FROTH FLOTATION IN THE PRESENCE OF A COLLECTOR AND IN THE PRESENCE AS A GANGUE DEPRESSANT OF WATERSOLUBLE, ANIONIC, LINEAR, ADDITION POLYMERS OF A POLYMERIZABLE MONOETHYLENICALLY UNSATURATED COMPOUND HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 10,000 AND BEING PRESENT IN AN AMOUNT SUFFICIENT TO DEPRESS SUBSTANTIALLY SAID GANGUE SLIMES.
Claim 2
Independent Claim
68 words
THE METHOD OF CONCENTRATING ORES CONTAINING GANGUE SLIMES WHICH COMPRISES SUBJECTING AN AQUEOUS PULP OF SAID ORE TO FROTH FLOTATION IN THE PRESENCE OF A COLLECTOR AND IN THE PRESENCE AS A GANGUE DEPRESSANT OF WATERSOLUBLE, ANIONIC, LINEAR, ADDITION POLYMERS OF A POLYMERIZABLE MONOETHYLENICALLY UNSATURATED COMPOUND HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST 10,000 AND BEING PRESENT IN AN AMOUNT SUFFICIENT TO DEPRESS SUBSTANTIALLY SAID GANGUE SLIMES.
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) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |