US2594612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of zinc values by selective flotation of sulfide ores
Assignee: California Research LLC
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Filing: 1949-11-01
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Granted: 1952-04-29
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Expires: 1969-11-01
Abstract
No abstract record available.
Inventors
- 👤 William A Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:55
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR THE RECOVERY OF ZINC SULFIDE FROM A SULFIDE ORE CONTAINING ZINC SULFIDE IN ADMIXTURE WITH PYRITES AND NON-SULFIDE GANGUE, WHICH COMPRISES EFFECTING FROTH-FLOTATION OF A PULP OF SAID ORE IN AN ALKALINE CIRCUIT HAVING A PH FROM ABOUT 7.0 TO ABOUT 11.0 IN THE PRESENCE OF PETROLEUM NITROGEN BASES CONSISTING ESSENTIALLY OF A MIXTURE OF ALKYLATED HETEROCYCLEC NITROGENBEARING COMPOUNDS BOILING BETWEEN ABOUT 120* F. TO ABOUT 630* F. AS THE SELECTIVE COLLECTOR FOR ZINC SULFIDE, AND SEPARATING A FROTH OF BENEFICIATED ZINC SULFIDE FROM A TAILING CONTAINING PYRITES AND NON-SULFIDE GANGUE.
Claim 2
Dependent Claim
94 words
A PROCESS FOR THE RECOVERY OF ZINC SULFIDE FROM A SULFIDE ORE CONTAINING ZINC SULFIDE IN ADMIXTURE WITH PYRITES AND NON-SULFIDE GANGUE, WHICH COMPRISES EFFECTING FROTH-FLOTATION OF A PULP OF SAID ORE IN AN ALKALINE CIRCUIT HAVING A PH FROM ABOUT 7.0 TO ABOUT 11.0 IN THE PRESENCE OF PETROLEUM NITROGEN BASES CONSISTING ESSENTIALLY OF A MIXTURE OF ALKYLATED HETEROCYCLEC NITROGENBEARING COMPOUNDS BOILING BETWEEN ABOUT 120* F. TO ABOUT 630* F. AS THE SELECTIVE COLLECTOR FOR ZINC SULFIDE, AND SEPARATING A FROTH OF BENEFICIATED ZINC SULFIDE FROM A TAILING CONTAINING PYRITES AND NON-SULFIDE GANGUE.
References Cited (Backward Citations)
US1302966A
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US1490736A
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US1438436A
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US1590196A
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US1610298A
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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) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |