US4902562A
Expired / Lapsed
US
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Electrically conductive materials
Assignee: Akzo Nobel UK PLC
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Filing: 1988-07-07
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Granted: 1990-02-20
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Expires: 2008-07-07
Abstract
Abstract Filled polymer material, which is either textile material comprising filaments of a fibre-forming polymer filled with a particulate conductive material or sheet material of a polymer filled with a particulate conductive material, treated with an organic liquid to increase its electrical conductivity.
Inventors
- 👤 Hardev S. Bahia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:18
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01B1/24; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T442/00; Y10T442/30; Y10T442/3146; Y10T442/3171; Y10T442/40; Y10T442/444; Y10T442/60; Y10T442/637; Y10T442/642
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
67 words
A process for increasing the electrical conductivity of a filled polymer material selected from the group consisting of a textile material comprising filaments of a fibre-forming polymer filled with a particulate conductive material or sheet material of a polymer filled with a particulate conductive material, said process comprising treating said filled polymer material with an organic liquid to increase the electrical conductivity of the filled polymer material.
Claim 2
Dependent Claim
67 words
A process for increasing the electrical conductivity of a filled polymer material selected from the group consisting of a textile material comprising filaments of a fibre-forming polymer filled with a particulate conductive material or sheet material of a polymer filled with a particulate conductive material, said process comprising treating said filled polymer material with an organic liquid to increase the electrical conductivity of the filled polymer material.
Claim 3
Dependent Claim
25 words
A process according to claim 1 in which said organic liquid is selected from the group consisting of hydrocarbons, halogenated hydrocarbons, ethers, ketones, and alcohols.
Claim 4
Dependent Claim
13 words
A process according to claim 1 in which said polymer is a polyolefin.
Claim 5
Dependent Claim
21 words
A process according to claim 3 in which the organic liquid used to treat the filled polymer material is a hydrocarbon.
Claim 6
Dependent Claim
22 words
A process according to claim 3 in which the organic liquid used to treat the filled polymer material is a halogenated hydrocarbon.
Claim 7
Dependent Claim
13 words
A process according to claim 5 in which said halogenated hydrocarbon is trichloroethylene.
Claim 8
Dependent Claim
13 words
A process according to claim 5 in which said halogenated hydrocarbon is perchloroethylene.
Claim 9
Dependent Claim
33 words
A process according to claim 1 in which said filled polymer material is immersed in said organic liquid for 0.1 to 120 minutes at a temperature in the range 10° to 100° C.
Claim 10
Dependent Claim
41 words
A process according to claim 8 in which said filled polymer material is initially immersed in said organic liquid at a temperature in the range 10 to 30° C. and is subsequently heated at a higher temperature up to 100° C.
Claim 11
Dependent Claim
14 words
The process according to claim 1 wherein said particulate conductive material is carbon black.
Claim 12
Dependent Claim
12 words
The process according to claim 1 wherein said fibreforming polymer is polypropylene.
Claim 13
Dependent Claim
41 words
Electrically conductive textile material comprising filaments of a fibre-forming polymer filled with 10 to 22% by volume of a conductive filler, said filaments having a modified surface produced by treating said textile material with an organic liquid to increase its conductivity.
Claim 14
Dependent Claim
41 words
Electrically conductive textile material comprising filaments of a fibre-forming polymer filled with 10 to 22% by volume of a conductive filler, said filaments having a modified surface produced by treating said textile material with an organic liquid to increase its conductivity.
Claim 15
Dependent Claim
16 words
Electrically conductive textile material according to claim 12 in which said conductive filler is carbon black.
Claim 16
Dependent Claim
21 words
Electrically conductive textile material according to claim 12 consisting of a fabric comprising yarns or filaments filled with said conductive filler.
Claim 17
Dependent Claim
19 words
Electrically conductive textile material according to claim 14 in which said fabric includes yarns not filled with conductive filler.
Claim 18
Dependent Claim
15 words
Electrically conductive textile material according to claim 12 in which said fibre-forming polymer is polypropylene.
Claim 19
Dependent Claim
39 words
Electrically conductive polymer sheet material comprising a polymer filled with 10-22% by volume of a conductive filler, said polymer sheet material having a modified surface produced by treating said sheet material with an organic liquid to increase its conductivity.
Claim 20
Dependent Claim
39 words
Electrically conductive polymer sheet material comprising a polymer filled with 10-22% by volume of a conductive filler, said polymer sheet material having a modified surface produced by treating said sheet material with an organic liquid to increase its conductivity.
Claim 21
Dependent Claim
17 words
Electrically conductive polymer sheet material according to claim 17 in which said conductive filler is carbon black.
Claim 22
Dependent Claim
15 words
Electrically conductive polymer sheet material according to claim 17 in which said polymer is polypropylene.
References Cited (Backward Citations)
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JPS60240720A
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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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |