Patent US3630892A successfully refreshed from Google Patents.
US3630892A
Expired / Lapsed
US
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Process for removing dissolved nickel from a contaminated liquid
Assignee: Hydromation Filter Co
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Filing: 1970-12-10
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Granted: 1971-12-28
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Expires: 1990-12-10
Abstract
Abstract A METHOD OF REMOVING NICKEL FROM PLATING RINSE WATER OR THE LIKE BY UPWARDLY ADJUSTING THE PH OF AN AQUEOUS NICKEL SOLUTION TO PRECIPITATE THE NICKEL AS A COLLODIAL SUSPENSION, PASSING THE PRECIPITATE SUSPENSION THROUGH A DEEPBED FILTER HAVING A GRANULAR, SYNTHETIC ORGANIC MEDIUM THEREIN TO DEPOSIT THE NICKEL PRECIPITATE ON THE FILTER MEDIUM, BACKWASHING THE FILTER MEDIUM TO REMOVE THE DEPOSITED NICKEL PRECIPITATE THEREFROM AND THEN FILTERING THE BACKWASH LIQUID THROUGH A CNVENTIONAL FILTRATION MECHANISM.
Inventors
- 👤 Gene Hirs
- 👤 Robert S Kozar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:06
CPC Classifications
C; C02; C02F; C02F9/00; C02F2101/00; C02F2101/10; C02F2101/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |