US4972038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyano-containing perfluoropolymers having iodine curesites
Assignee: EIDP Inc
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Filing: 1989-05-19
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Granted: 1990-11-20
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Expires: 2009-05-19
Abstract
Abstract Perfluoropolymers prepared from tetrofluoroethylene, perfluro (alkyl vinyl) ether and cyano-cure site monomer, and further comprising iodo moieties, and cured elastomers prepared from the perfluoropolymers.
Inventors
- 👤 Anestis L. Logothetis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:41
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/38; C08F214/00; C08F214/18; C08F214/26; C08F214/262
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
53 words
In a perfluoropolymer having randomly copolymerized units of tetrafluoroethylene, perfluoro ether and fluorinated curesite monomer containing nitrile groups, the improvement wherein the perfluoropolymer further comprises iodo moieties present in an amount of at least about 0.05 percent, by weight of the perfluoropolymer and wherein the iodo moieties are derived from saturated iodo compounds.
Claim 2
Dependent Claim
53 words
In a perfluoropolymer having randomly copolymerized units of tetrafluoroethylene, perfluoro ether and fluorinated curesite monomer containing nitrile groups, the improvement wherein the perfluoropolymer further comprises iodo moieties present in an amount of at least about 0.05 percent, by weight of the perfluoropolymer and wherein the iodo moieties are derived from saturated iodo compounds.
Claim 3
Dependent Claim
22 words
A perfluoropolymer of claim 1 wherein the iodo moieties are present in an amount of about from 0.05 to 1.0 weight percent.
Claim 4
Dependent Claim
22 words
A perfluoropolymer of claim 2 wherein the iodo moieties are present in an amount of about from 0.1 to 0.5 weight percent.
Claim 5
Dependent Claim
20 words
A perfluoropolymer of claim 1 wherein the iodo moieties are substantially all positioned on the ends of the polymer chains.
Claim 6
Dependent Claim
29 words
A perfluoropolymer of claim 1 wherein the cyano-containing curesites comprise at least about 0.3%, by weight of the perfluoropolymer, and are randomly distributed along the backbone of the perfluoropolymer.
Claim 7
Dependent Claim
19 words
A perfluoropolymer of claim 5 wherein the cyano-moieties comprise about from 1 to 2% by weight of the perfluoropolymer.
Claim 8
Dependent Claim
18 words
A perfluoropolymer of claim 1 wherein the perfluoro (alkyl vinyl) ether consists essentially of perfluoro (methyl vinyl) ether.
Claim 9
Dependent Claim
18 words
A perfluoropolymer of claim 1 wherein the perfluoro (alkyl vinyl) ether is a perfluoro (alkoxy alkyl vinyl) ether.
Claim 10
Dependent Claim
17 words
A perfluoropolymer of claim 8 wherein the perfluoro (alkoxy alkyl vinyl) ether consists essentially of perfluoro (5-methyl-3,6-dioxa-1-nonene).
Claim 11
Dependent Claim
10 words
A cured perfluoroelastomer prepared from the perfluoropolymer of claim 1.
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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) | 1993-11-19 | 1994-05-21 | 1994-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-19 | 1998-05-21 | 1998-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-19 | 2002-05-21 | 2002-11-20 | $7700.00 | Window Closed / Lapsed |