US3682701A
Expired / Lapsed
US
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Integrated waste water treatment for reusage after cyanide type plating
Assignee: LANCY LAB
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Filing: 1970-02-12
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Granted: 1972-08-08
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Expires: 1990-02-12
Abstract
Abstract USED OR WASTE WASH WATE TREATMENT SOLUTION FROM INDIVIDUAL CYANIDE TYPE PLATING LINES THAT APPLY COATINGS OF DIFFERENT METALS ON WORKPIECES, HAVING A CHELATING COMPOUND AND A DISSOLVED CONTENT OF PLATING METAL THAT HAVE BEEN PICKED UP FROM DRAG-OUT ON THE WORKPIECES, IS TREATED WITH A SALT OF METALS OF THE CLASS CONSISTING OF CALCIUM, BARIUM, LITHIUM, ALUMINUM AND MAGESIUM, THE SALT ACTS AS AN EXCHANGE ELEMENT IN THE CHELATING COMPOUND TO REPLACE A MORE NOBLE DISSOLVED METAL CONTENT IN THE WASH WATER TREATMENT SOLUTION BEFORE IT IS REUSED TO WASH-OFF DRAG-OUT FROM WORKPIECES BEING PROCESSED IN A DIFFERENT PLATING LINE.
Inventors
- 👤 Leslie E Lancy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:30
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; C25; C25D; C25D21/00; C25D21/16; C25D21/20; C02F2101/00; C02F2101/10; C02F2101/16; C02F2101/18; C02F2103/00; C02F2103/16
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |