US3247133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming graft copolymer ion exchange membranes
Assignee: AMF Inc
•
Filing: 1962-11-02
•
Granted: 1966-04-19
•
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 19:57
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.
References Cited (Backward Citations)
US3133889A
Cited
US2340111A
Cited
US2591573A
Cited
GB728508A
Cited
US2921005A
Cited
US2837496A
Cited
US2827426A
Cited
US3115418A
Cited
US2965697A
Cited
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 |