Patent US2900352A successfully refreshed from Google Patents.
US2900352A
Expired / Lapsed
US
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Anion exchange resins and method of preparation thereof
Assignee: Chemical Process Co
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Filing: 1955-12-28
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Granted: 1959-08-18
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Expires: 1975-12-28
Abstract
No abstract record available.
Inventors
- 👤 James A Patterson
- 👤 Irving M Abrams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:02
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C08F8/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE METHOD OF MAKING AN ANION EXCHANGE RESIN WHICH COMPRISES REACTING A SOLID LINEAR POLYMER OF FROM THE GROUP CONSISTING OF A SOLID LINEAR POLYMER OF A MONO VINYL ARYL HYDROCARBON AND A LINEAR POLYMER OF A MONO VINYL ARYL NUCLEAR CHLORINATED HYDROCARBON, WITH CHLOROSULFONIC ACID AND FORMALDEHYDE TO CROSS-LINK THE PLOYMER, AND INCLUDING A PRIMARY ALCOCHOL CONTAINING FROM 1 TO 4 CARBONS ATOMS TO INTRODUCE SIDE CHAINS IN SAID POLYMER THERE BEING AT LEAST ONE MOLE OF CHLORO SULFONIC ACID AND ONE MOLE OF FORMALDEHYDE FOR EACH GROUP IN SAID POLYMER, THE CONCENTRATION OF ACID BEING AT LEAST 70% OF THE WEIGHT OF ACID AND WATER PRESENT, AND THEM TREATING THE RESULTANT REACTED POLYMER WITH AN AMINE WHEREBY ANION EXCHANGE GROUPS ARE ATTACHED TO ACTIVE SIDE CHAINS IN THE POLYMER.
Claim 2
Independent Claim
131 words
THE METHOD OF MAKING AN ANION EXCHANGE RESIN WHICH COMPRISES REACTING A SOLID LINEAR POLYMER OF FROM THE GROUP CONSISTING OF A SOLID LINEAR POLYMER OF A MONO VINYL ARYL HYDROCARBON AND A LINEAR POLYMER OF A MONO VINYL ARYL NUCLEAR CHLORINATED HYDROCARBON, WITH CHLOROSULFONIC ACID AND FORMALDEHYDE TO CROSS-LINK THE PLOYMER, AND INCLUDING A PRIMARY ALCOCHOL CONTAINING FROM 1 TO 4 CARBONS ATOMS TO INTRODUCE SIDE CHAINS IN SAID POLYMER THERE BEING AT LEAST ONE MOLE OF CHLORO SULFONIC ACID AND ONE MOLE OF FORMALDEHYDE FOR EACH GROUP IN SAID POLYMER, THE CONCENTRATION OF ACID BEING AT LEAST 70% OF THE WEIGHT OF ACID AND WATER PRESENT, AND THEM TREATING THE RESULTANT REACTED POLYMER WITH AN AMINE WHEREBY ANION EXCHANGE GROUPS ARE ATTACHED TO ACTIVE SIDE CHAINS IN THE POLYMER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |