US3764503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodialysis regeneration of metal containing acid solutions
Assignee: Lancy International Inc
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Filing: 1972-01-19
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Granted: 1973-10-09
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Expires: 1992-01-19
Abstract
Abstract INCREASE IN CONCENTRATION IN THE CATHOLYTE SOLUTION AND THE FORMING OF UNEVEN DENDRITIC CATHODE DEPOSITS OF THE METAL ARE AVOIDED BY PASSING THE METAL IONS INTO AN IMMEDIATE CATHODIC CELL THAT DOES NOT FUNCTION TO PLATE-OUT OR DEPOSIT METAL IONS THEREIN. A USED OR WASTE ACID TREATING SOLUTION THAT HAS BEEN CONTAMINATED BY ITS DISSOLVED METAL CONTENT IS INTRODUCED INTO AN ANODIC CELL OR COMPARTMENT OF A DIALYSIS CELL SYSTEM. METAL IONS ARE PASSED FROM THE ANODIC COMPARTMENT THROUGH A CATIONIC PERMSELECTIVE PERMEABLE MEMBRANE INTO A CATHODIC CELL OR COMPARTMENT OF THE SYSTEM. A POOR EFFICIENCY OF METAL DIFFUSION DUE TO ITS PROGRESSIVE
Inventors
- 👤 L Lancy
- 👤 D Kruse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:47
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/52; C; C23; C23F; C23F1/00; C23F1/46; C23G; C23G1/00; C23G1/36
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |