US4434273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluoroketovinyl ethers and copolymers therefrom
Assignee: EIDP Inc
•
Filing: 1982-09-29
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Granted: 1984-02-28
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Expires: 2002-09-29
Abstract
Abstract Perfluoroketovinyl ether of the formula (as in claim 1) wherein n is an integer 1 to 4; copolymers of such ether and a fluorinated monomer, such as tetrafluoroethylene; ion-exchange resins of such copolymers; and ion-exchange membranes of such resins.
Inventors
- 👤 Ronald E. Uschold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:08
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2237; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C43/17; C07C45/00; C07C45/51; C07C45/54; C07C49/00; C07C49/20; C07C49/255; C07C59/00; C07C59/40; C07C59/58; C07C59/60; C08F; C08F16/00; C08F16/12; C08F16/14; C08F16/26; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
24 words
Copolymer of the perfluoroketovinyl ether of the formula ##STR13## wherein n is an integer 1 to 4 and one or more fluorinated vinyl monomers.
Claim 2
Dependent Claim
24 words
Copolymer of the perfluoroketovinyl ether of the formula ##STR13## wherein n is an integer 1 to 4 and one or more fluorinated vinyl monomers.
Claim 3
Dependent Claim
19 words
Copolymer of perfluoroketovinyl ether of the formula ##STR14## wherein n is 1 and one or more fluorinated vinyl monomers.
Claim 4
Dependent Claim
19 words
Copolymer of perfluoroketovinyl ether of the formula ##STR14## wherein n is 1 and one or more fluorinated vinyl monomers.
Claim 5
Dependent Claim
11 words
Copolymer of claim 1 wherein the fluorinated vinyl monomer is tetrafluoroethylene.
Claim 6
Dependent Claim
7 words
Film of the copolymer of claim 1.
Claim 7
Dependent Claim
12 words
Copolymer of claim 1 which has been hydrolyzed in an aqueous medium.
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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) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |