US4522889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightning protection composite material
Assignee: Bayer AG
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Filing: 1984-01-12
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Granted: 1985-06-11
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Expires: 2004-01-12
Abstract
Abstract A carbon fibre or aramid fibre fabric in a matrix of thermoset plastic is coated first with a thin layer of nickel, then with a highly conductive second layer, and on the outside once more with nickel. If the metals are deposited under wet-chemical currentless conditions, the flexible fabric will be electrically highly conductive. The composite material is particularly suitable for lightning and NEMP protection.
Inventors
- 👤 Harold Ebneth
- 👤 Gerhard D. Wolf
- 👤 Henning Giesecke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:22
CPC Classifications
D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/127; B; B64; B64D; B64D45/00; B64D45/02; D06; D06Q; D06Q1/00; D06Q1/04; H; H01; H01B; H01B1/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
60 words
A lightning protection composite material comprising a metallised textile sheetlike structure embedded in a plastics matrix, the sheetlike structure comprising C-containing fibre material to which have been applied in succession at least two, metal layers having a total surface resistance of less than 1 Ohm at least one metal layer is nickel and at least on metal layer is cooper.
Claim 2
Dependent Claim
60 words
A lightning protection composite material comprising a metallised textile sheetlike structure embedded in a plastics matrix, the sheetlike structure comprising C-containing fibre material to which have been applied in succession at least two, metal layers having a total surface resistance of less than 1 Ohm at least one metal layer is nickel and at least on metal layer is cooper.
Claim 3
Dependent Claim
22 words
A lightning protection material according to claim 1, characterised in that the metal layer applied directly to the fibre consists of nickel.
Claim 4
Dependent Claim
26 words
A lightning protection composite material according to claim 1, characterised in that the metal layer applied directly to the fibre is generated under wet-chemical currentless conditions.
Claim 5
Dependent Claim
25 words
A lightning protection composite material according to claim 1, characterised in that the thickness of the directly applied metal layer is less than 0.3 μm.
Claim 6
Dependent Claim
31 words
A lightning protection composite material according to claim 1, characterised in that the second metal layer is highly conductive and comprises copper which is applied by wet-chemical currentless or electrochemical means.
Claim 7
Dependent Claim
27 words
A lightning protection composite material according to claim 1, characterised in that an outside corrosion protection metal layer is applied to the highly conductive second metal layer.
Claim 8
Dependent Claim
21 words
A lightning protection composite material according to claim 1, characterised in that it carriers a third, outside metal layer comprising nickel.
Claim 9
Dependent Claim
29 words
A lightning protection composite material according to claim 1, characterised in that the textile material consists of graphitic carbon fibres or aramid fibres or a mixture of the two.
Claim 10
Dependent Claim
15 words
A lightning protection composite material according to claim 1, characterised in that the matrix consists
Claim 11
Dependent Claim
20 words
A lightning protection material according to claim 1, wherein the metal weighs from about 180 to 404 g/m 2 .
Claim 12
Dependent Claim
19 words
A lightning protection material according to claim 1, wherein the metal weighs less than about 180 g/m 2 .
Claim 13
Dependent Claim
13 words
A lightning protection material according to claim 11, wherein the metal comprises nickel.
References Cited (Backward Citations)
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US3755713A
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US4435465A
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US4471015A
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US4341823A
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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) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |