Patent US3257334A successfully refreshed from Google Patents.
US3257334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodialysis membrane from perhalogenated fluorocarbons
Assignee: AMF Inc
•
Filing: 1963-01-21
•
Granted: 1966-06-21
•
Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Chen William Kwo-Wei
- 👤 Halter Howard Martin
- 👤 Hotelling Eric Bell
- 👤 Wetmore Clayton Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:35
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/08; B; B01; B01D; B01D61/00; B01D61/42; B01D61/422; B01D69/00; B01D69/12; B01D69/125; B01D71/00; B01D71/06; B01D71/28; B01D71/281; B01D71/30; B01D71/32; C08F8/00; C08F8/18; C08F8/24; C08F8/34; C08F8/36; C08F8/44; B01D2325/00; B01D2325/14; B01D2325/42; B01D69/02; B01D71/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
IN A METHOD OF MAKIN ION CONDUCTIVE MATERIAL IN WHICH A LIQUID VINYL MONOMER IS POLYMERIZED IN THE PRESENCE OF A POLYMER AND A FREE RADICAL GENERATING CATALYST, THE STEP OF INTRODUCING SAID LIQUID VINYL MONOMER INTO A SOLID POLYMER MATRIX OF PERHALOGENATED FLUROCARBON MATERIAL PRIOR TO POLYMERIZATION AND THEREAFTER PROVIDING ION EXCHANGE GROUPS IN THE PRODUCT.
Claim 2
Dependent Claim
57 words
IN A METHOD OF MAKIN ION CONDUCTIVE MATERIAL IN WHICH A LIQUID VINYL MONOMER IS POLYMERIZED IN THE PRESENCE OF A POLYMER AND A FREE RADICAL GENERATING CATALYST, THE STEP OF INTRODUCING SAID LIQUID VINYL MONOMER INTO A SOLID POLYMER MATRIX OF PERHALOGENATED FLUROCARBON MATERIAL PRIOR TO POLYMERIZATION AND THEREAFTER PROVIDING ION EXCHANGE GROUPS IN THE PRODUCT.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |