Patent US2501269A successfully refreshed from Google Patents.
US2501269A
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Froth flotation of sulfide ores
Assignee: Minerec Corp
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Filing: 1946-06-26
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Granted: 1950-03-21
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Expires: 1966-06-26
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:03
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/014; B03D1/012; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
THE METHOD OF CONCENTRATING SULPHIDE ORE WHICH COMPRISE SUBJECTING THE ORE IN THE FORM OF A PULP TO A FROTH FLOTATION OPERTION IN THE PRESENCE OF A COMPOUND HAVING THE STRUCTURAL FORMULA:
Claim 2
Independent Claim
32 words
THE METHOD OF CONCENTRATING SULPHIDE ORE WHICH COMPRISE SUBJECTING THE ORE IN THE FORM OF A PULP TO A FROTH FLOTATION OPERTION IN THE PRESENCE OF A COMPOUND HAVING THE STRUCTURAL FORMULA:
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) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |