US4536352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluoro vinyl ethers
Assignee: Asahi Kasei Corp
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Filing: 1981-12-14
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Granted: 1985-08-20
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Expires: 2001-12-14
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 12:32
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: 3
Claim 1
Independent Claim
23 words
A fluorinated vinyl ether compound represented by the formula: ##STR61## wherein n is 2 and p' is an integer of 0 to 1.
Claim 2
Dependent Claim
23 words
A fluorinated vinyl ether compound represented by the formula: ##STR61## wherein n is 2 and p' is an integer of 0 to 1.
Claim 3
Dependent Claim
10 words
A compound according to claim 1, wherein p' is 0.
References Cited (Backward Citations)
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JPS5223192A
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JPS5228588A
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JPS5236589A
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US4151653A
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JPS53116287A
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US4176215A
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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) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |