US2663702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for quaternarizing polymers of n, n di-methyl-p-aminostyrene
Assignee: Wyeth Holdings LLC
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Filing: 1949-07-02
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Granted: 1953-12-22
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Expires: 1969-07-02
Abstract
No abstract record available.
Inventors
- 👤 Edward L Kropa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:18
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44; C08F212/00; C08F212/02; C08F212/04; C08F212/14; C08F212/26; C08F212/28; Y; Y10; Y10S; Y10S526/00; Y10S526/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR THE PREPARATION OF A GRANULAR, WATER-INSOLUBLE, ANION EXCHANGE RESIN ACTIVE FOR THE REMOVAL OF ANIONS FROM SOLUTION WHICH COMPRISES COPOLYMERIZING N,N-DIMETHYL-P-AMINOSTYRENE WITH A POLYMERIZABLE ORGANIC MATERIAL CONTAINING AT LEAST TWO ETHYLENIC DOUBLE BONDS AND NOT ALIPHATIC CONJUGATED CARBON-TO-CARBON DOUBLE BONDS IN THE PRESENCE OF A POLYMERIZATION CATALYST WHICH IS AN AZO COMPOUND AND IN THE ABSENCE OF AIR, CURING THE COPOLYMER OBTAINED BY HEATING, GRANULATING THE CURED COPOLYMER, AND TREATING THE GRANULATED CURED COPOLYMER WITH AN ALKYLATING AGENT IN AN AMOUNT SUFFICIENT TO EFFECT QUATERNARIZATION OF THE TERTIARY AMINO GROUPS IN SAID COPOLYMER, THE MOLAR RATIO OF SAID N,N-DIMETHYLP-AMINOSTYRENE TO SAID POLYMERIZABLE ORGANIC MATTER IN SAID COPOLYMER BEING FROM ABOUT 10:1 TO ABOUT 1:1.
Claim 2
Dependent Claim
117 words
A PROCESS FOR THE PREPARATION OF A GRANULAR, WATER-INSOLUBLE, ANION EXCHANGE RESIN ACTIVE FOR THE REMOVAL OF ANIONS FROM SOLUTION WHICH COMPRISES COPOLYMERIZING N,N-DIMETHYL-P-AMINOSTYRENE WITH A POLYMERIZABLE ORGANIC MATERIAL CONTAINING AT LEAST TWO ETHYLENIC DOUBLE BONDS AND NOT ALIPHATIC CONJUGATED CARBON-TO-CARBON DOUBLE BONDS IN THE PRESENCE OF A POLYMERIZATION CATALYST WHICH IS AN AZO COMPOUND AND IN THE ABSENCE OF AIR, CURING THE COPOLYMER OBTAINED BY HEATING, GRANULATING THE CURED COPOLYMER, AND TREATING THE GRANULATED CURED COPOLYMER WITH AN ALKYLATING AGENT IN AN AMOUNT SUFFICIENT TO EFFECT QUATERNARIZATION OF THE TERTIARY AMINO GROUPS IN SAID COPOLYMER, THE MOLAR RATIO OF SAID N,N-DIMETHYLP-AMINOSTYRENE TO SAID POLYMERIZABLE ORGANIC MATTER IN SAID COPOLYMER BEING FROM ABOUT 10:1 TO ABOUT 1:1.
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) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |