US2614099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anion exchange resins
Assignee: Dow Chemical Co
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Filing: 1948-12-29
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Granted: 1952-10-14
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Expires: 1968-12-29
Abstract
No abstract record available.
Inventors
- 👤 William C Bauman
- 👤 Mckellar Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:36
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A WATER-INSOLUBLE RESINOUS COMPOSITION SUITABLE FOR THE REMOVAL OF ANIONS FROM FLUIDS, WHICH COMPRISES THE REACTION PRODUCT OF (1) A BENZENEINSOLUBLE COPOLYMER CONTAINING IN CHEMICALLY COMBINED FORM FROM 0.5 TO 40 PER CENT BY WEIGHT OF A POLYVINYL-AROMATIC HYDROCARBON AND FROM 99.5 TO 60 PER CENT OF A MONOVINYL-AROMATIC COMPOUND OF THE CLASS CONSISTING OF MONOVINYL-AROMATIC HYDROCARBONS HAVING THE VINYL RADICAL DIRECTLY ATTACHED TO A CARBON ATOM OF THE AROMATIC NUCLEUS AND NUCLEAR HALOGENATED DERIVATIVES THEREOF, WHICH COPOLYMER CONTAINS AN AVERAGE OF FROM 0.2-TO 1,2 HALOMETHYL GROUPS PER AROMATIC NUCLEUS IN THE COPOLYMER, WITH (2) A TERTIARY AMINE SELECTED FROM THE GROUP CONSISTING OF THE TERTIARY MONO- AND DI-ALKYL N-SUBSTITUTED ALKANOL AND ALKANEDIOL AMINES, IN AMOUNT SUCH THAT THERE IS PRESENT IN THE REACTION MIXTURE AT LEAST ONE MOLE OF THE TERTIARY AMINE FOR EACH HALOMETHYL GROUP IN THE COPOLYMER.
Claim 2
Dependent Claim
140 words
A WATER-INSOLUBLE RESINOUS COMPOSITION SUITABLE FOR THE REMOVAL OF ANIONS FROM FLUIDS, WHICH COMPRISES THE REACTION PRODUCT OF (1) A BENZENEINSOLUBLE COPOLYMER CONTAINING IN CHEMICALLY COMBINED FORM FROM 0.5 TO 40 PER CENT BY WEIGHT OF A POLYVINYL-AROMATIC HYDROCARBON AND FROM 99.5 TO 60 PER CENT OF A MONOVINYL-AROMATIC COMPOUND OF THE CLASS CONSISTING OF MONOVINYL-AROMATIC HYDROCARBONS HAVING THE VINYL RADICAL DIRECTLY ATTACHED TO A CARBON ATOM OF THE AROMATIC NUCLEUS AND NUCLEAR HALOGENATED DERIVATIVES THEREOF, WHICH COPOLYMER CONTAINS AN AVERAGE OF FROM 0.2-TO 1,2 HALOMETHYL GROUPS PER AROMATIC NUCLEUS IN THE COPOLYMER, WITH (2) A TERTIARY AMINE SELECTED FROM THE GROUP CONSISTING OF THE TERTIARY MONO- AND DI-ALKYL N-SUBSTITUTED ALKANOL AND ALKANEDIOL AMINES, IN AMOUNT SUCH THAT THERE IS PRESENT IN THE REACTION MIXTURE AT LEAST ONE MOLE OF THE TERTIARY AMINE FOR EACH HALOMETHYL GROUP IN THE COPOLYMER.
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) | 1955-10-14 | 1956-04-14 | 1956-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-14 | 1960-04-14 | 1960-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-14 | 1964-04-14 | 1964-10-14 | $7700.00 | Window Closed / Lapsed |