Patent FR1546118A successfully refreshed from Google Patents.
US3147214A
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Removal of anions from aqueous solutions
Assignee: Permutit Co Ltd
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Filing: 1961-02-14
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Granted: 1964-09-01
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Expires: 1981-02-14
Abstract
No abstract record available.
Inventors
- 👤 Kressman Theodore Roger Ernest
- 👤 Millar John Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:37
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14; B01J41/04; B01J41/05; C; C08; C08J; C08J9/00; C08J9/28; C08J9/286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS IN WHICH AN AQUEOUS LIQUID CONTAINING BOTH ORGANIC IMPURITIES AND INORGANIC ANIONS IS TREATED WITH A PARTICULATE ANION-EXCHANGE RESIN CONTAINING STRONGLY BASIC GROUPS, SAID RESIN HAVING PORES THEREIN OF A MEAN PORE DIAMETER OF AT LEAST ABOUT 100 ANGSTROM UNITS, SAID ANION-EXCHANGE RESIN HAVING BEEN PRODUCED BY COPOLYMERISING A MONOMER HAVING ONE POLYMERIZABLE DOUBLE BOND, AND AT LEAST 25% OF A CROSS-LINKING AGENT HAVING TWO POLYMERIZABLE DOUBLE BONDS, IN A SOLUTION IN AN ORGANIC LIUQID WHICH IS A SOLVENT FOR THE MONOMER MIXTURE, BUT IS NOT A SOLVENT FOR THE COPOLYMER AT ROOM TEMPERATURE, THE SOLVENT CONSTITUTING FROM 30% TO 80% OF THE TOTAL MIXTURE.
Claim 2
Dependent Claim
107 words
A PROCESS IN WHICH AN AQUEOUS LIQUID CONTAINING BOTH ORGANIC IMPURITIES AND INORGANIC ANIONS IS TREATED WITH A PARTICULATE ANION-EXCHANGE RESIN CONTAINING STRONGLY BASIC GROUPS, SAID RESIN HAVING PORES THEREIN OF A MEAN PORE DIAMETER OF AT LEAST ABOUT 100 ANGSTROM UNITS, SAID ANION-EXCHANGE RESIN HAVING BEEN PRODUCED BY COPOLYMERISING A MONOMER HAVING ONE POLYMERIZABLE DOUBLE BOND, AND AT LEAST 25% OF A CROSS-LINKING AGENT HAVING TWO POLYMERIZABLE DOUBLE BONDS, IN A SOLUTION IN AN ORGANIC LIUQID WHICH IS A SOLVENT FOR THE MONOMER MIXTURE, BUT IS NOT A SOLVENT FOR THE COPOLYMER AT ROOM TEMPERATURE, THE SOLVENT CONSTITUTING FROM 30% TO 80% OF THE TOTAL MIXTURE.
References Cited (Backward Citations)
US2591573A
Cited
US2591574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |