Patent US112121A successfully refreshed from Google Patents.
Patent US4511518A successfully refreshed from Google Patents.
US4511518A
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Perfluorinated fluorosulfonylalkyleneoxy-2-propanoyl fluoride and hexafluoroepoxide addition compounds
Assignee: Asahi Kasei Corp
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Filing: 1983-08-30
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Granted: 1985-04-16
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Expires: 2003-08-30
Abstract
Abstract A novel fluorinated copolymer is prepared by copolymerization of a fluorinated olefin with a novel sulfur containing fluorinated vinylether of the formula: ##STR1## wherein k is 0 or 1 and l is an integer of 3 to 5, which is prepared from starting materials, which are also novel. Said copolymer is useful for preparation of a fluorinated cation exchange membrane having carboxylic acid groups and/or sulfonic acid groups which can be used advantageously in electrolysis of an aqueous alkali metal halide solution with improved electrolysis performance.
Inventors
- 👤 Kyoji Kimoto
- 👤 Hirotsugu Miyauchi
- 👤 Jukichi Ohmura
- 👤 Mikio Ebisawa
- 👤 Toshioki Hane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:44
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/78; C07C309/79; C07C309/82; C07C309/84; C07C317/00; C07C317/16; C07C317/18; C07C323/00; C07C323/10; C07C323/11; C07C323/12; C07D; C07D327/00; C07D327/02; C07D327/04; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/08; C08F214/18; C08F214/184; C08F214/26; C08F214/262; C08F216/00; C08F216/12; C08F216/14; C08F216/1466; C08F216/1475; C08F8/00; C08F8/04; C08F8/12; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2237; C25; C25B; C25B13/00; C25B13/04; C25B13/08; C08J2327/00; C08J2327/02; C08J2327/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
27 words
A fluorinated acid fluoride represented by the formula: ##STR63## wherein n is an integer of 2 to 4 and p is an integer of 0 to 50.
Claim 2
Dependent Claim
27 words
A fluorinated acid fluoride represented by the formula: ##STR63## wherein n is an integer of 2 to 4 and p is an integer of 0 to 50.
Claim 3
Dependent Claim
12 words
A fluorinated acid fluoride according to claim 1 wherein n is 2.
Claim 4
Dependent Claim
17 words
A fluorinated acid fluoride according to claim 1 or claim 2, wherein p is 0 or 1.
References Cited (Backward Citations)
US3301893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |