Patent US4756691A successfully refreshed from Google Patents.
Patent US2675359A successfully refreshed from Google Patents.
US2675359A
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Weakly basic anion-exchange resins
Assignee: Rohm and Haas Co
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Filing: 1952-04-14
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Granted: 1954-04-13
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Expires: 1972-04-14
Abstract
No abstract record available.
Inventors
- 👤 Henry J Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:10
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14; C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
AN INSOLUBLE, ANION-EXCHANGE RESIN WHICH IS THE PRODUCT OBTAINED BY REACTING AT A TEMPERATURE FROM 140* C. TO 250* C. (A) A CROSSLINKED COPOLYMER OF 80-99% ON A MOLAR BASIS OF AN ESTER HAVING THE GENERAL FORMULA CH2=CRCOOR'', IN WHICH R IS A MEMBER OF THE CLASS CONSISTING OF A HYDROGEN ATOM AND A METHYL GROUP AND R'' IS A MONOVALENT HYDROCARBON RADICAL CONTAINING 1-8 CARBON ATOMS, AND 1-20% ON A MOLAR BASIS OF A COPOLYMERIZABLE MATERIAL FROM THE CLASS CONSISTING OF DIVINYLBENZENE, TRIVINYLBENZENE, DIVINYLTOLUENE, DIVINYLTHYLBENZENE, DIVINYLXYLENE, DIVINYLNAPHTHALENE AND N,N''METHYLENE BISACRYLAMIDE, AND (B) A POLYAMINE WHICH CONTAINS AT LEAST ONE PRIMARY AMINO GROUP, SAID POLYAMINE BEING PRESENT DURING THE REACTION IN A RATIO GREATER THAN ONE MOLE PER MOLE OF SAID ESTER AND SAID COPOLYMERIZABLE COMPOUND IN SAID COPOLYMER.
Claim 2
Dependent Claim
129 words
AN INSOLUBLE, ANION-EXCHANGE RESIN WHICH IS THE PRODUCT OBTAINED BY REACTING AT A TEMPERATURE FROM 140* C. TO 250* C. (A) A CROSSLINKED COPOLYMER OF 80-99% ON A MOLAR BASIS OF AN ESTER HAVING THE GENERAL FORMULA CH2=CRCOOR'', IN WHICH R IS A MEMBER OF THE CLASS CONSISTING OF A HYDROGEN ATOM AND A METHYL GROUP AND R'' IS A MONOVALENT HYDROCARBON RADICAL CONTAINING 1-8 CARBON ATOMS, AND 1-20% ON A MOLAR BASIS OF A COPOLYMERIZABLE MATERIAL FROM THE CLASS CONSISTING OF DIVINYLBENZENE, TRIVINYLBENZENE, DIVINYLTOLUENE, DIVINYLTHYLBENZENE, DIVINYLXYLENE, DIVINYLNAPHTHALENE AND N,N''METHYLENE BISACRYLAMIDE, AND (B) A POLYAMINE WHICH CONTAINS AT LEAST ONE PRIMARY AMINO GROUP, SAID POLYAMINE BEING PRESENT DURING THE REACTION IN A RATIO GREATER THAN ONE MOLE PER MOLE OF SAID ESTER AND SAID COPOLYMERIZABLE COMPOUND IN SAID COPOLYMER.
References Cited (Backward Citations)
US2582194A
Cited
US2597437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |