US4689601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer ignition wire
Assignee: Essex Technology Inc
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Filing: 1986-08-25
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Granted: 1987-08-25
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Expires: 2006-08-25
Abstract
Abstract Automotive ignition wire with a high temperature rating, excellent electrical insulating properties, heat resistance, oil resistance and abrasion resistance is described. The wire utilizes a conductor made up of either a helically wound metal conductor on a radio frequency insulating polymer overcoated on a polymer adhesive layer on a glass fiber bundle; or a glass fiber-cotton fiber braid on a graphite impregnated glass layer. Overcoating either one of the conductors is a semiconducting polymer layer, and a polymer jacket material. The polymer jacket material comprises a polymeric mixture of ethylene vinyl acetate and ethylene-propylene-diene monomer stabilized with a mixture of a phenolic antioxidant and a metal salt antioxidant.
Inventors
- 👤 Ronald J. Coffey
- 👤 Christo M. Wassouf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:49
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01B7/292; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; H01B7/0063; H01B7/28; H01B7/2806
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
Electrically conductive ignition wire comprising a glass fiber core overcoated with an adhesion promoting polymer layer, which is overcoated wih a radio frequency insulating polymer, having helically wrapped thereon electrically conducting wire, which is overcoated with a semiconduting polymer layer containing release agent and a polymer jacket coated on the semiconducting polymer layer, the polymer jacket comprising a mixture of ethylene-propylene dien monomer containing polymer with ethylene vinyl acetate, stabilized with a mixture of phenolic antioxidant and a metal salt antioxidant.
Claim 2
Dependent Claim
81 words
Electrically conductive ignition wire comprising a glass fiber core overcoated with an adhesion promoting polymer layer, which is overcoated wih a radio frequency insulating polymer, having helically wrapped thereon electrically conducting wire, which is overcoated with a semiconduting polymer layer containing release agent and a polymer jacket coated on the semiconducting polymer layer, the polymer jacket comprising a mixture of ethylene-propylene dien monomer containing polymer with ethylene vinyl acetate, stabilized with a mixture of phenolic antioxidant and a metal salt antioxidant.
Claim 3
Dependent Claim
69 words
Electrically conductive ignition wire comprising a graphite impregnated glass fiber core overbraided with a glass and cotton fiber braid, which is overcoated with a semiconducting polymer layer containing release agent, and a polymer jacket layer coated over the semiconducting poymer layer, the polymer jacket comprising a mixture of ethylene-propylene-diene monomer containing polymer with ethylene vinyl acetate stabilized with a mixture of a phenolic antioxidant and a metal salt antioxidant.
Claim 4
Dependent Claim
69 words
Electrically conductive ignition wire comprising a graphite impregnated glass fiber core overbraided with a glass and cotton fiber braid, which is overcoated with a semiconducting polymer layer containing release agent, and a polymer jacket layer coated over the semiconducting poymer layer, the polymer jacket comprising a mixture of ethylene-propylene-diene monomer containing polymer with ethylene vinyl acetate stabilized with a mixture of a phenolic antioxidant and a metal salt antioxidant.
Claim 5
Dependent Claim
45 words
The wire of claim 1 wherein the ethylene vinyl acetate polymer contains 40% by weight vinyl acetate and the antioxidant mixture is present in an amount of about 3.5% by weight and the weight ratio of phenolic antioxidant to metal salt antixidant is about 1:2.
Claim 6
Dependent Claim
45 words
The wire of claim 2 wherein the ethylene vinyl acetate polymer contains 40% by weight vinyl acetate and the antioxidant mixture is present in an amount of about 3.5% by weight and the weight ratio of phenolic antioxidant to metal salt antioxidant is about 1:2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-24 | 1991-02-23 | 1991-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-24 | 1995-02-23 | 1995-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-24 | 1999-02-23 | 1999-08-25 | $7700.00 | Window Closed / Lapsed |