Patent US4613467A successfully refreshed from Google Patents.
US4613467A
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Fluorosulfonylperfluoroalkyl compounds
Assignee: Asahi Kasei Corp
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Filing: 1983-08-30
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Granted: 1986-09-23
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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 13:29
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: 6
Claim 1
Independent Claim
78 words
A fluorinated carboxylic acid or its derivative represented by the formula: FSO.sub.2 (CF.sub.2).sub.n Y wherein Y is --COY 1 or --CN, Y 1 being halogen, hydrogen, --NH 2 , --OM, wherein M is a member selected from the group consisting of hydrogen, a metal and ammonium, or --OR 1 , wherein R 1 is a member selected from the group consisting of C 1 -C 10 alkyl and aryl; and n is an integer of 2 to 4.
Claim 2
Dependent Claim
78 words
A fluorinated carboxylic acid or its derivative represented by the formula: FSO.sub.2 (CF.sub.2).sub.n Y wherein Y is --COY 1 or --CN, Y 1 being halogen, hydrogen, --NH 2 , --OM, wherein M is a member selected from the group consisting of hydrogen, a metal and ammonium, or --OR 1 , wherein R 1 is a member selected from the group consisting of C 1 -C 10 alkyl and aryl; and n is an integer of 2 to 4.
Claim 3
Dependent Claim
15 words
A fluorinated carboxylic acid or its derivative according to claim 1, wherein n is 2.
Claim 4
Dependent Claim
18 words
A fluorinated carboxylic acid or its derivative according to claim 1 or claim 2, wherein Y is --COF.
Claim 5
Dependent Claim
14 words
A fluorinated carboxylic acid or its derivative represented by the formula: FSO.sub.2 CF.sub.2 COF.
Claim 6
Dependent Claim
14 words
A fluorinated carboxylic acid or its derivative represented by the formula: FSO.sub.2 CF.sub.2 COF.
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) | 1989-09-22 | 1990-03-24 | 1990-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-22 | 1994-03-24 | 1994-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-22 | 1998-03-24 | 1998-09-23 | $7700.00 | Window Closed / Lapsed |