US4273829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulation system for wire and cable
Assignee: Champlain Cable Corp
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Filing: 1979-08-30
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Granted: 1981-06-16
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Expires: 1999-08-30
Abstract
Abstract An insulated electrical conductor is provided that exhibits excellent physical, electrical and chemical protection for wire and cable and is particularly suitable for use in aircraft applications. The electrical conductor is insulated with (A) a film selected from ethylene tetrafluoroethylene copolymer film and fluorinated ethylene-propylene (FEP) copolymer coated polyimide film and (B) a topcoat insulation system comprising (a) a first layer of polyimide, (b) a second layer of polyvinylidene fluoride, and (c) a third layer of crosslinked acrylic polymer.
Inventors
- 👤 Aime J. Perreault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:04
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01B7/292; H01B7/02; H01B7/0275; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
An insulated electrical conductor comprising a metallic conductor insulated with (A) a film selected from ethylene tetrafluoroethylene copolymer and fluorinated ethylene-propylene (FEP) copolymer coated polyimide, and (B) a topcoat insulation system comprising a first layer of insulation consisting essentially of a high melting polyimide coating adhering to said film, a second layer of insulation consisting essentially of polyvinylidene fluoride coating adhering to the surface of the polyimide coating and a third layer of insulation consisting essentially of a crosslinked acrylic polymer coating adhering to the surface of the polyvinylidene fluoride.
Claim 2
Dependent Claim
90 words
An insulated electrical conductor comprising a metallic conductor insulated with (A) a film selected from ethylene tetrafluoroethylene copolymer and fluorinated ethylene-propylene (FEP) copolymer coated polyimide, and (B) a topcoat insulation system comprising a first layer of insulation consisting essentially of a high melting polyimide coating adhering to said film, a second layer of insulation consisting essentially of polyvinylidene fluoride coating adhering to the surface of the polyimide coating and a third layer of insulation consisting essentially of a crosslinked acrylic polymer coating adhering to the surface of the polyvinylidene fluoride.
Claim 3
Dependent Claim
20 words
The insulated electrical conductor of claim 1 in which the film insulating the metallic conductor is ethylene tetrafluoroethylene copolymer film.
Claim 4
Dependent Claim
23 words
The insulated electrical conductor of claim 1 in which the film insulating the metallic conductor is fluorinated ethylene-propylene (FEP) copolymer coated polyimide film.
Claim 5
Dependent Claim
34 words
The insulated electrical conductor of claims 1, 2 or 3 in which the polyimide coating is prepared from a polybenzimide made by condensing equal molar amounts of an aromatic hydrocarbon diamine with pyromellitic dianhydride.
Claim 6
Dependent Claim
16 words
The insulated electrical conductor of claims 1, 2 or 3 in which the polyimide is polybenzimidazole.
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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) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |