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US3260686A
Expired / Lapsed
US
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Ion exchange resins prepared from the saponification of copolymers of the nvinylimides of dicarboxylic acids and a cross-linking agent containing at least two non-conjugated vinylidene groups
Assignee: Bayer AG
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Filing: 1961-08-08
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Granted: 1966-07-12
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Expires: 1981-08-08
Abstract
No abstract record available.
Inventors
- 👤 Seifert Hans
- 👤 Nenkirchen Bergisch
- 👤 Corte Herbert
- 👤 Netz Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:09
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14; C08F8/28; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR PREPARING ION-EXCHANGE RESINS WHICH COMPRISES COPOLYMERIZING A VINYLIMIDE OF A DICARBOXYLIC ACID IN THE PRESENCE OF A CROSS-LINKING MONOMER CONTAINING AT LEAST TWO NON-CONJUGATED CH2=C$ MOIETIES; SAID MONOMER BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF DIVINYLBENZENE, DIVINYL TOLUENE, TRIVINYL BENZENE, TRIALLYL CYANURATE, DIVINYL ETHER, 1,3,5-HEXAHYDROTRIACRYLYL-S-TIAZINE, ETHYLENE GLYCOL DIMETHACRYLATE, ETHYLENE GLYCOL DIACRYLATE, DIVINYL SULFIDE, DIVINYL SULFONE, DIALLYL PHTHALATE, DIALLYL MAELATE, AND DIALLYL ETHER; IN THE PRESENCE OF AN ACTIVE AMOUNT OF A POLYMERIZATION CATALYST, SAID CROSS-LINKING MONOMER BEING PRESENT IN AN AMOUNT OF 1 TO 40 PERCENT BY WEIGHT OF THE MONOMER QUANTITY TO BE USED AS A WHOLE, SAPONIFYING THE RESULTING COPOLYMER AND RECOVERING THE RESIN PRODUCT.
Claim 2
Dependent Claim
112 words
A PROCESS FOR PREPARING ION-EXCHANGE RESINS WHICH COMPRISES COPOLYMERIZING A VINYLIMIDE OF A DICARBOXYLIC ACID IN THE PRESENCE OF A CROSS-LINKING MONOMER CONTAINING AT LEAST TWO NON-CONJUGATED CH2=C$ MOIETIES; SAID MONOMER BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF DIVINYLBENZENE, DIVINYL TOLUENE, TRIVINYL BENZENE, TRIALLYL CYANURATE, DIVINYL ETHER, 1,3,5-HEXAHYDROTRIACRYLYL-S-TIAZINE, ETHYLENE GLYCOL DIMETHACRYLATE, ETHYLENE GLYCOL DIACRYLATE, DIVINYL SULFIDE, DIVINYL SULFONE, DIALLYL PHTHALATE, DIALLYL MAELATE, AND DIALLYL ETHER; IN THE PRESENCE OF AN ACTIVE AMOUNT OF A POLYMERIZATION CATALYST, SAID CROSS-LINKING MONOMER BEING PRESENT IN AN AMOUNT OF 1 TO 40 PERCENT BY WEIGHT OF THE MONOMER QUANTITY TO BE USED AS A WHOLE, SAPONIFYING THE RESULTING COPOLYMER AND RECOVERING THE RESIN PRODUCT.
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |