US3681210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of mixed plating rinses
Assignee: Industrial Filter and Pump Manufacturing Co
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Filing: 1971-04-08
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Granted: 1972-08-01
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Expires: 1991-04-08
Abstract
Abstract A METHOD AND SYSTEM FOR TREATING MIXED RINSE WATERS USED TO RINSE WORKPIECES REMOVED FROM CHROMIUM AND OTHER METAL TREATING BATHS PROVIDES FOR REDUCING HEXAVALENT CHROMIUM IONS CARRIED BY THE WORKPIECES PRIOR TO RINSING AND MIXING THE RINSE WATERS FROM A PLURALITY OF DIFFERENT RINSES PRIOR TO PASSAGE THEREOF THROUGH CATION AND ANION EXCHANGERS. THE METHOD AND SYSTEM ALSO PROVIDE FOR THE IMMEDIATE REMOVAL OF CN FROM THE ANION REGENERANT WHILE IT HAS A HIGH PH VALUE AND THEN COMBINING THE CATION AND ANION REGENERANTS PRIOR TO NETRALIZATION.
Inventors
- 👤 James F Zievers
- 👤 Charles J Novotny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:09
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/42; B; B01; B01J; B01J39/00; B01J39/04; B01J49/00; B01J49/05; B01J49/08; C01; C01G; C01G37/00; C01G37/003; C02F1/72; C02F1/76; C02F2101/00; C02F2101/10; C02F2101/16; C02F2101/18; C02F2101/20; C02F2101/22; C02F2103/00; C02F2103/16; Y; Y10; Y10S; Y10S204/00; Y10S204/13
Claims Analysis
Total Claims: 0
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |