US4421678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conductive compositions comprising an ethylene polymer, a mineral filler and an oiled, electrically conductive carbon black
Assignee: Union Carbide Corp
•
Filing: 1980-12-29
•
Granted: 1983-12-20
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Expires: 2000-12-29
Abstract
Abstract Electrically conductive compositions comprising an ethylene polymer, a mineral filler and carbon black having a surface area greater than about 500 m2/gram, these compositions being useful as extrudates about electrical conductors providing conductive shields thereon.
Inventors
- 👤 Aspy K. Mehta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:53
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
An electrically conductive composition comprising an ethylene polymer, a mineral filler and conductive carbon black having a surface area greater than about 500 m 2 /gram and oiled with a paraffin mineral oil of lubricating viscosity wherein the mineral filler is present in an amount of about 5 to about 30 percent by weight and the oiled carbon black is present in an amount of about 5 to about 25 percent by weight.
Claim 2
Dependent Claim
73 words
An electrically conductive composition comprising an ethylene polymer, a mineral filler and conductive carbon black having a surface area greater than about 500 m 2 /gram and oiled with a paraffin mineral oil of lubricating viscosity wherein the mineral filler is present in an amount of about 5 to about 30 percent by weight and the oiled carbon black is present in an amount of about 5 to about 25 percent by weight.
Claim 3
Dependent Claim
44 words
A composition as defined in claim 1 wherein the mineral filler is present in an amount of about 10 to about 20 percent by weight and the oiled carbon black is present in an amount of about 10 to about 15 percent by weight.
Claim 4
Dependent Claim
17 words
A composition as defined in claim 1 wherein the paraffin mineral oil is a white mineral oil.
Claim 5
Dependent Claim
19 words
A composition as defined in claim 1 wherein the ethylene polymer is a copolymer of ethylene and ethyl acrylate.
Claim 6
Dependent Claim
19 words
A composition as defined in claim 1 wherein the ethylene polymer is a copolymer of ethylene and vinyl acetate.
Claim 7
Dependent Claim
13 words
A composition as defined in claim 1 wherein the mineral filler is talc.
Claim 8
Dependent Claim
22 words
A composition as defined in claim 6 wherein the talc is coated with a fatty acid having 8 to 20 carbon atoms.
Claim 9
Dependent Claim
40 words
A composition as defined in claim 6 wherei the talc is coated with a metal salt of a fatty acid having 8 to 20 carbon atoms wherein the metal is of Groups Ia, IIa or IIb of the Periodic Table.
Claim 10
Dependent Claim
21 words
A composition as defined in claim 1 wherein the carbon black has a surface area of about 1000 m 2 /gram.
Claim 11
Dependent Claim
12 words
A composition as defined in claim 1 which contains an organic peroxide.
Claim 12
Dependent Claim
11 words
The crosslinked product of a composition as defined in claim 10.
Claim 13
Dependent Claim
23 words
An electrical conductor having as a conductive shield thereon a composition or the crosslinked product of a composition as defined in 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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |