Patent US4555543A successfully refreshed from Google Patents.
US4555543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoropolymer coating and casting compositions and films derived therefrom
Assignee: Saint Gobain Performance Plastics Corp
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Filing: 1984-04-13
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Granted: 1985-11-26
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Expires: 2004-04-13
Abstract
Abstract A fluoroplastic resin dispersion is modified by the addition of a fluoroelastomer latex to yield a fluid coating or casting composition. The fluoroplastic resin dispersion, preferably an aqueous dispersion of a perfluoroplastic, such as polytetrafluoroethylene (PTFE), is modified by blending with a fluoroelastomer composition, preferably a latex, such that the fluoroplastic comprises up to about 95%, preferably up to about 90%, by weight of the invention composition. The fluoroelastomer component comprises at least about 5% by weight of the blend. The fluid compositions according to the invention may preferably comprise from about 10-95% by weight fluoroplastic and from about 5-95% fluoroelastomer.
Inventors
- 👤 John A. Effenberger
- 👤 Frank M. Keese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:37
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/48; C04B41/4838; C04B41/4842; C08; C08J; C08J5/00; C08J5/18; C08L; C08L27/00; C08L27/02; C08L27/12; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C08J2327/00; C08J2327/02; C08J2327/12; C08L2205/00; C08L2205/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
27 words
A fluid composition which comprises a blend of a perfluoroelastomer and a perfluoroplastic, wherein the perfluoroplastic component comprises up to about 95% by weight of the composition.
Claim 2
Dependent Claim
27 words
A fluid composition which comprises a blend of a perfluoroelastomer and a perfluoroplastic, wherein the perfluoroplastic component comprises up to about 95% by weight of the composition.
Claim 3
Dependent Claim
23 words
A fluid composition according to claim 1 which comprises a blend of about 10-95% by weight perfluoroplastic and about 5-9% by weight perfluoroelastomer.
Claim 4
Dependent Claim
20 words
A fluid composition according to claim 1 wherein the perfluoroplastic comprises up to about 90% by weight of the blend.
Claim 5
Dependent Claim
15 words
A fluid composition according to claim 1 wherein the perfluoroplastic is in an aqueous dispersion.
Claim 6
Dependent Claim
16 words
A fluid composition according to claim 1 wherein the perfluoroplastic is polytetrafluoroethylene or fluorinated ethylene propylene.
Claim 7
Dependent Claim
13 words
A fluid composition according to claim 1 wherein the perfluoroelastomer is a latex.
Claim 8
Dependent Claim
20 words
A fluid composition according to claim 6 wherein the perfluoroelastomer is a copolymer of tetrafluoroethylene and hexafluoropropylene or perfluoromethylvinyl ether.
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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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |