US3224873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-liquid recovery of copper values using alpha-hydroxy oximes
Assignee: General Mills Inc
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Filing: 1963-02-25
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Granted: 1965-12-21
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Expires: 1983-02-25
Abstract
No abstract record available.
Inventors
- 👤 Ronald R Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:29
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0063; C22B3/00; C22B3/20; C22B3/26; C22B3/30; C22B5/00; C22B5/02; C22B5/12; C23; C23F; C23F1/00; C23F1/46; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR THE RECOVERY OF COPPER VALUES FROM AN AQEOUS SOLUTION COMPRISING: (1) CONTACTING SAID AQUEOUS SOLUTION WITH AN ORGANIC PHASE COMPRISING A LIQUID HYDROCARBON AND AN A-HYDROXY OXIME TO EXTRACT AT LEAST A PORTION OF THE COPPER VALUES INTO THE ORGANIC PHASE, SAID OXIME BEING CHARACTERIZED AS HAVING A SOLUBILITY OF AT LEAST 2% BY WEIGHT IN THE LIQUID HYDROCARBON AND HAVING THE FORMULA: R-C(-OH)(-R")-C(=N-OH)-R'' WHERE R AND R'' ARE ORGANIC HYDROCARBON RADICALS AND R" IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND ORGANIC HYDROCARBON RADICALS; (2) SEPARATING THE RESULTANT COPPER-PREGNANT ORGANIC PHASE FROM THE RESULTANT COPER-BARREN AQUEOUS PHASE; AND (3) RECOVERING THE COPPER-PREGNANT ORGANIC PHASE.
Claim 2
Dependent Claim
109 words
A PROCESS FOR THE RECOVERY OF COPPER VALUES FROM AN AQEOUS SOLUTION COMPRISING: (1) CONTACTING SAID AQUEOUS SOLUTION WITH AN ORGANIC PHASE COMPRISING A LIQUID HYDROCARBON AND AN A-HYDROXY OXIME TO EXTRACT AT LEAST A PORTION OF THE COPPER VALUES INTO THE ORGANIC PHASE, SAID OXIME BEING CHARACTERIZED AS HAVING A SOLUBILITY OF AT LEAST 2% BY WEIGHT IN THE LIQUID HYDROCARBON AND HAVING THE FORMULA: R-C(-OH)(-R")-C(=N-OH)-R'' WHERE R AND R'' ARE ORGANIC HYDROCARBON RADICALS AND R" IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND ORGANIC HYDROCARBON RADICALS; (2) SEPARATING THE RESULTANT COPPER-PREGNANT ORGANIC PHASE FROM THE RESULTANT COPER-BARREN AQUEOUS PHASE; AND (3) RECOVERING THE COPPER-PREGNANT ORGANIC PHASE.
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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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |