US2642514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange process with magnetic ion exchange resins
Assignee: Wyeth Holdings LLC
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Filing: 1946-08-10
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Granted: 1953-06-16
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Expires: 1966-08-10
Abstract
No abstract record available.
Inventors
- 👤 Earl C Herkenhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:56
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/42; B; B01; B01J; B01J49/00; B01J49/10; B01J49/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
A PROCESS WHICH COMPRISES BRINGING A LIQUID CONTAINING IONIZABLE SOLIDS INT CONTACT WITH A MIXTURE OF A MAGNETIC CATION EXCHANGE RESIN AND AN ANION EXCHANGE RESIN UNTIL THE MIXTURE OF RESINS NO LONGER HAS A CAPACITY FOR REMOVING IONIZABLE SOLIDS FROM THE LIQUID, SEPARATING THE MIXTURE OF EXHAUSTED RESINS FROM SAID LIQUIDS, AND SEPARATING THE CATION EXCHANGE RESIN FROM THE ANION EXCHANGE RESIN BY MAGNETIC MEANS, BRINGING THE SEPARATED MAGNETIC CATION EXCHANGE RESIN INT CONTACT WITH A DILUTE SOLUTIN OF AN ACID, BRINGING THE SEPARATED ANION EXCHANGE RESIN INTO CONTACT WITH A DILUTE SOLUTION OF AN ALKALI, MIXING THE SO-REACTIVATED CATION AND ANION EXCHANGE RESINS TOGETHER AND BRINGING A LIQUID CONTAINING IONIZABLE SOLIDS INTO CONTACT WITH THE MIXTURE.
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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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |