US2788331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anion exchange resins from cross-linked halogenated polyvinylaromatic polymers
Assignee: Permutit Co
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Filing: 1953-04-21
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Granted: 1957-04-09
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Expires: 1973-04-21
Abstract
No abstract record available.
Inventors
- 👤 Albert H Greer
- 👤 Martin E Gilwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:45
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; Y; Y10; Y10S; Y10S526/00; Y10S526/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
AN ANION EXCHANGE RESIN OF IMPROVED OPERATING CAPACITY, WHICH COMPRISES THE PRODUCT PRODUCED BY FIRST HALOALKYLATING A HALOGEN-CONTAINING COPOLYMER RESIN COMPRISING A HALOGEN-CONTAINING POLYMERIZATE OF A VINYL AROMATIC HYDROCARBON AND A DIOELFINIC UNSATURATED ALIPHATIC CROSSLINKER COMPOUND, SAID HALOGENATED COPOLYMER RESIN CONTAINING BETWEEN ABOUT 0.2% AND 4.0% HALOGEN BEFORE BEING HALOALKYLATED, SAID HALOALKYLATED PRODUCT CONTAINING AT LEAST ABOUT 0.77 HALOALKYL GROUPS PER AROMATIC NUCLEUS, AND THEN TREATING THE RESULTING HALOALKYLATED, HALOGENATED COPOLYMER RESIN WITH AN AMINE.
Claim 2
Dependent Claim
75 words
AN ANION EXCHANGE RESIN OF IMPROVED OPERATING CAPACITY, WHICH COMPRISES THE PRODUCT PRODUCED BY FIRST HALOALKYLATING A HALOGEN-CONTAINING COPOLYMER RESIN COMPRISING A HALOGEN-CONTAINING POLYMERIZATE OF A VINYL AROMATIC HYDROCARBON AND A DIOELFINIC UNSATURATED ALIPHATIC CROSSLINKER COMPOUND, SAID HALOGENATED COPOLYMER RESIN CONTAINING BETWEEN ABOUT 0.2% AND 4.0% HALOGEN BEFORE BEING HALOALKYLATED, SAID HALOALKYLATED PRODUCT CONTAINING AT LEAST ABOUT 0.77 HALOALKYL GROUPS PER AROMATIC NUCLEUS, AND THEN TREATING THE RESULTING HALOALKYLATED, HALOGENATED COPOLYMER RESIN WITH AN AMINE.
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) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |