US4617351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt extrudable composition of perfluorocarbon polymers
Assignee: EIDP Inc
•
Filing: 1985-12-19
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Granted: 1986-10-14
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Expires: 2005-12-19
Abstract
Abstract In this invention the extrusion rate of melt extrudable thermoplastic perfluorocarbon polymers is enhanced by the addition of up to 1% by weight of a hydrocarbon polymer.
Inventors
- 👤 Thomas A. Heckel, Jr.
- 👤 Felice J. Rizzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:35
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; C08L23/00; C08L23/02; C08L23/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
62 words
A melt extrudable thermoplastic perfluorocarbon polymer having a melt viscosity of between 1×10 2 and 1×10 6 Pa.s containing up to about 1 percent by weight of a hydrocarbon polymer, said hydrocarbon polymer being present in an amount which results in an increased extrusion rate before electrical flows are observed, as compared to the same perfluorocarbon polymer not containing any hydrocarbon polymer.
Claim 2
Dependent Claim
62 words
A melt extrudable thermoplastic perfluorocarbon polymer having a melt viscosity of between 1×10 2 and 1×10 6 Pa.s containing up to about 1 percent by weight of a hydrocarbon polymer, said hydrocarbon polymer being present in an amount which results in an increased extrusion rate before electrical flows are observed, as compared to the same perfluorocarbon polymer not containing any hydrocarbon polymer.
Claim 3
Dependent Claim
28 words
The polymer of claim 1 wherein the hydrocarbon polymer contains units derived from CH 2 ═CHR wherein R is hydrogen or alkyl of up to 8 carbon atoms.
Claim 4
Dependent Claim
18 words
The composition of claim 1 or 2 wherein the perfluorocarbon polymer is a copolymer of tetrafluoroethylene and hexafluoropropylene.
Claim 5
Dependent Claim
21 words
The composition of claim 1 or 2 wherein the hydrocarbon polymer is a copolymer of ethylene/propylene/diene or a copolymer of ethylene/propylene.
Claim 6
Dependent Claim
13 words
The composition of claim 1 or 2 wherein the hydrocarbon polymer is polyethylene.
Claim 7
Dependent Claim
16 words
The composition of claim 3 wherein the hydrocarbon polymer is polyethylene or a copolymer of ethylene/propylene/1,4-hexadiene.
References Cited (Backward Citations)
SU235641A1
Cited
US3125547A
Cited
US3334157A
Cited
GB1120131A
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US3519703A
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US3940455A
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JPS512561A
Cited
JPS5116638A
Cited
SU938098A1
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US4489113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |