Patent US3582504A successfully refreshed from Google Patents.
US3582504A
Expired / Lapsed
US
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Method for separating and isolating ion exchange resins
Assignee: Ecodyne Corp
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Filing: 1970-04-20
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Granted: 1971-06-01
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Expires: 1990-04-20
Abstract
Abstract IN THE REGENERATION OF MIXED-BED ION EXCHANGE RESINS, THE RESINS ARE FIRST SEPARATED IN THE CONVENTIONAL MANNER BY AN UPFLOW OF LIQUID. THE RESINS ARE THEN ISOLATED FROM ONE ANOTHER, AND CONTAMINANT CATION EXCHANGE RESIN IS SEPARATED FROM THE ANION EXHANGE RESIN BY FLOATING THE ANION EXCHANGE RESIN IN AN INTERMEDIATE-DENSITY LIQUID HAVING A DENSITY INTERMEDIATE BETWEEN THE CATION AND ANION EXCHANGE RESINS. THE CONTAMINANT CATION EXCHANGE RESIN SINKS TO THE BOTTOM OF THE VESSEL, PERMITTING THE ANION EXCHANGE RESIN TO BE READILY ISOLATED.
Inventors
- 👤 Eli Salem
- 👤 Joseph H Duff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:30
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/05; B01J49/09
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |