US2648431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of copper oxide oreswith nitrites
Assignee: Individual
•
Filing: 1950-08-30
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Granted: 1953-08-11
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Expires: 1970-08-30
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Kasevniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:17
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/002; B03D2201/00; B03D2201/007; B03D2203/00; B03D2203/02; B03D2203/04; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN THE METHOD OF CONCENTRATING ORES CONTAINING COPPER OXIDE BY FLOTATION PROCESSES, THE STEP OF CONDITIONING THE ORE WITH A METAL NITRITE SELECTED FROM THE GROUP CONSISTING OF AMMONIUM NITRITE, ALKALI METAL NITRITIES AND ALKALI EARTH METAL NITRITES IN PREPARATION FOR THE FROTH FLOTATION THEREOF WITH SUITABLE FROTHERS, SULPHIDIZERS AND COLLECTORS FOR SULPHIDE ORES.
Claim 2
Dependent Claim
54 words
IN THE METHOD OF CONCENTRATING ORES CONTAINING COPPER OXIDE BY FLOTATION PROCESSES, THE STEP OF CONDITIONING THE ORE WITH A METAL NITRITE SELECTED FROM THE GROUP CONSISTING OF AMMONIUM NITRITE, ALKALI METAL NITRITIES AND ALKALI EARTH METAL NITRITES IN PREPARATION FOR THE FROTH FLOTATION THEREOF WITH SUITABLE FROTHERS, SULPHIDIZERS AND COLLECTORS FOR SULPHIDE ORES.
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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |