Patent US3247133A successfully refreshed from Google Patents.
US3247133A
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Method of forming graft copolymer ion exchange membranes
Assignee: AMF Inc
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Filing: 1962-11-02
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Granted: 1966-04-19
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Expires: 1982-11-02
Abstract
No abstract record available.
Inventors
- 👤 Chen William Kwo-Wei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:20
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44; C08F8/18; C08F8/24; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2287; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF MAKING ION EXCHANGE MEMBRANE COMPRISING CONTACTING A FIRST SOLID, ORGANIC, WATER INSOLUBLE CARRIER POLYMER POLYMERIZED FROM AN ETHYLENICALLY UNSATURATED MONOMER AND A SECOND DIFFERENT FLUID ORGANIC ETHYLENICALLY UNSATURATED MONOMER, CAUSING THE MONOMER TO POLYMERIZE BY A FREE RADICAL MECHANISM AND TO PENETRATE INTO SAID CARRIER POLYMER, AND PROVIDING ION EXCHANGE GROUPS IN THE COMPOSITE POLYMER PRODUCT, SAID PRODUCT BEING A FILM HAVING ION EXCHANGE GROUPS PENETRATING THE ENTIRE THICKNESS.
Claim 2
Independent Claim
72 words
A METHOD OF MAKING ION EXCHANGE MEMBRANE COMPRISING CONTACTING A FIRST SOLID, ORGANIC, WATER INSOLUBLE CARRIER POLYMER POLYMERIZED FROM AN ETHYLENICALLY UNSATURATED MONOMER AND A SECOND DIFFERENT FLUID ORGANIC ETHYLENICALLY UNSATURATED MONOMER, CAUSING THE MONOMER TO POLYMERIZE BY A FREE RADICAL MECHANISM AND TO PENETRATE INTO SAID CARRIER POLYMER, AND PROVIDING ION EXCHANGE GROUPS IN THE COMPOSITE POLYMER PRODUCT, SAID PRODUCT BEING A FILM HAVING ION EXCHANGE GROUPS PENETRATING THE ENTIRE THICKNESS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |