Patent US4481249A successfully refreshed from Google Patents.
US4481249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallized carbon fibres and composite materials containing these fibres
Assignee: Bayer AG
•
Filing: 1983-06-24
•
Granted: 1984-11-06
•
Expires: 2003-06-24
Abstract
Abstract Carbon filaments and fibres and sheets manufactured from them which have excellent properties of adherence to plastics without loss of tensile strength are obtained when the carbon filaments and fibres are provided with a metal coating by a current-less process.
Inventors
- 👤 Harold Ebneth
- 👤 Lothar Preis
- 👤 Henning Giesecke
- 👤 Gerhard D. Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:24
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4242; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/127; D04H1/4234; D04H1/4382; D04H1/43825; D04H1/43828; D04H3/00; D04H3/002; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249948; Y10T428/26; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/294; Y10T428/2958; Y10T428/30; Y10T428/31504; Y10T428/31511; Y10T428/31529
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A composite material comprising a fiber reinforced matrix, said fiber being a nickel coated carbon fiber of graphite-like structure having an elastic modulus above 300,000 MPa, said matrix being an epoxide resin matrix, said nickel coated carbon fiber being bonded to said matrix, said carbon fibers having been metallized with said nickel by a current-less process employing an organo-metallic compound of an element of sub-group 1 or 8 of the periodic system as an activating agent and a liquid metallization bath.
Claim 2
Dependent Claim
81 words
A composite material comprising a fiber reinforced matrix, said fiber being a nickel coated carbon fiber of graphite-like structure having an elastic modulus above 300,000 MPa, said matrix being an epoxide resin matrix, said nickel coated carbon fiber being bonded to said matrix, said carbon fibers having been metallized with said nickel by a current-less process employing an organo-metallic compound of an element of sub-group 1 or 8 of the periodic system as an activating agent and a liquid metallization bath.
Claim 3
Dependent Claim
19 words
A composite material according to claim 1 wherein the thickness of said nickel coating is 0.1 to 1 μm.
Claim 4
Dependent Claim
19 words
A composite material according to claim 1 wherein the thickness of said nickel coating is 0.05 to 10 μm.
Claim 5
Dependent Claim
39 words
A composite material according to claim 1 wherein the expoxide resin matrix composition containing said carbon fiber is one prepared by contacting a carbon fiber with butadiene palladium chloride and treating the resultant material with a nickel metallization bath.
Claim 6
Dependent Claim
18 words
A composite material according to claim 4 wherein said nickel metallization bath comprises a solution of nickel chloride.
Claim 7
Dependent Claim
35 words
A composite material according to claim 1 wherein the interlaminar shear strength between said expoxide resin matrix and said nickel coated carbon fiber is 46.4 to 58 MPa, determined in accordance with ASTM D 2344.
Claim 8
Dependent Claim
25 words
A composite material according to claim 1 wherein said nickel coated carbon fibers are in the form of woven or knitted fabrics or braided fabrics.
References Cited (Backward Citations)
US2532283A
Cited
US3550247A
Cited
US3671291A
Cited
US3671285A
Cited
US3833402A
Cited
US4169911A
Cited
US4341823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |