Patent US2716826A successfully refreshed from Google Patents.
US5262234A
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US
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Polyetrafluoroethylene fiber containing conductive filler
Assignee: W.L. Gore and Associates Inc
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Filing: 1992-07-16
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Granted: 1993-11-16
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Expires: 2012-07-16
Abstract
Abstract A fiber of expanded porous polytetrafluoroethylene in which an amount of a conductive particulate filler is incorporated imparting a measure of conductivity to the fiber is disclosed. The fiber may be twisted along its length. The fiber may be a continuous monofilament fiber, a tow, a staple, or a flock.
Inventors
- 👤 Raymond B. Minor
- 👤 Gordon L. McGregor
- 👤 William P. Mortimer, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:47
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/44; D02G3/441; D01; D01D; D01D5/00; D01D5/24; D01D5/247; D01F; D01F1/00; D01F1/02; D01F1/09; D01F6/00; D01F6/02; D01F6/08; D01F6/12; D10; D10B; D10B2101/00; D10B2101/02; D10B2101/04; D10B2101/08; D10B2101/10; D10B2101/12; D10B2101/20; D10B2201/00; D10B2201/01; D10B2201/02; D10B2211/00; D10B2211/01; D10B2211/02; D10B2321/00; D10B2321/04; D10B2321/042; D10B2331/00; D10B2331/02; D10B2331/021; D10B2331/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
49 words
A fiber which comprises: an expanded polytetrafluoroethylene (PTFE) and a conductive particulate filler distributed within the PTFE, the fiber having a bulk tensile strength of at least 65,000 KPa; wherein the fiber is twisted along its longitudinal axis so as to density the PTFE and decrease its volume resistivity.
Claim 2
Dependent Claim
49 words
A fiber which comprises: an expanded polytetrafluoroethylene (PTFE) and a conductive particulate filler distributed within the PTFE, the fiber having a bulk tensile strength of at least 65,000 KPa; wherein the fiber is twisted along its longitudinal axis so as to density the PTFE and decrease its volume resistivity.
Claim 3
Dependent Claim
14 words
A fiber as in claim 1 wherein the conductive particulate filler is a metal.
Claim 4
Dependent Claim
15 words
A fiber as in claim 1 wherein the conductive particulate filler is a metal oxide.
Claim 5
Dependent Claim
15 words
A fiber as in claim 1 wherein the conductive particulate filler as in carbon black.
Claim 6
Dependent Claim
20 words
A fiber as in claim 1 wherein the fiber has a volume resistivity of 1×10 3 ohm cm or less.
Claim 7
Dependent Claim
18 words
A fiber as in claim 1 wherein the fiber has a volume resistivity of 10 ohm or less.
Claim 8
Dependent Claim
30 words
A fiber as in claim 1 wherein the fiber has a bulk tensile strength of 200,000 kPa or greater and a volume resistivity of 1×10 3 ohm cm or less.
Claim 9
Dependent Claim
16 words
A fiber as in claim 1 wherein the fiber has 1 to 18 twists per cm.
Claim 10
Dependent Claim
16 words
A fiber as in claim 8 wherein the fiber has 4 to 11 twists per cm.
Claim 11
Dependent Claim
13 words
A fiber as in claim 1 wherein the fiber is a continuous monofilament.
Claim 12
Dependent Claim
12 words
A fiber as in claim 1 wherein the fiber is a tow.
Claim 13
Dependent Claim
12 words
A fiber as in claim 1 wherein the fiber is a stable.
Claim 14
Dependent Claim
12 words
A fiber as in claim 1 wherein the fiber is a flock.
References Cited (Backward Citations)
US3953566A
Cited
US4064214A
Cited
US4031283A
Cited
US4478665A
Cited
US4680220A
Cited
EP0344689A1
Cited
US5061561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |