US3669631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of materials from ion exchange resins
Assignee: United States Atomic Energy Commission
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Filing: 1970-01-08
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Granted: 1972-06-13
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Expires: 1990-01-08
Abstract
Abstract A PROCESS FOR REMOVAL OF MATERIALS FROM SPENT ION EXCHANGE RESIN WHEREIN THE SPENT RESIN IS MIXED WITH AN ACIDIC SOLUTION INCLUDING A CAYALYST AND HYDROGEN PEROXIDE, AND THE MIXTURE IS HEATED TO A TEMPERATURE AT WHICH THE EXOTHERMIC REACTION OF THE MIXTURE IS INITIATED AND MAINTAINED AT THAT TEMPERATURE UNTIL THE REACTION IS COMPLETED. THE RESULTING SOLUTION MAY BE FILTERED AND THE FILTRATE FURTHER PROCESSED TO RECOVER THE DESIRED MATERIALS.
Inventors
- 👤 Lee A Dietrich
- 👤 John C Dikeman
- 👤 Kenneth R Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:54
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/42; B; B01; B01J; B01J49/00; B01J49/50; G; G21; G21F; G21F9/00; G21F9/28; G21F9/30; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |