Patent US3720257A successfully refreshed from Google Patents.
US3720257A
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US
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Method of producing carbon fiber-reinforced metal
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1970-12-18
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Granted: 1973-03-13
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Expires: 1990-12-18
Abstract
Abstract A method of producing carbon fiber-reinforced metal wherein the carbon fibers are first coated with nickel, the coated fibers are then combined with a melt of the metal heated in a crucible under a vacuum or protective gaseous atmosphere to exclude the possibility of oxidation and which is then allowed to solidify. Suitable materials for the metallic melt are aluminum, copper, tin and alloys of these metals all of which meet the requirement of a melting temperature lower than that of nickel.
Inventors
- 👤 A Perry
- 👤 H Beutler
- 👤 Lamotte E De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:56
CPC Classifications
C; C22; C22C; C22C49/00; C22C49/14; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12535; Y10T428/12625; Y10T428/12736; Y10T428/12743
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
The method of producing a carbon fiber-reinforced metal body which comprises the sequence of steps of enhancing the electrical conductivity of the carbon fibers by initially covering them with a copper coating having a thickness of from 20 to 100 A; completely covering the copper-coated surfaces of the carbon fibers with a uniform layer of nickel having a thickness not greater than 1 micron; surrounding said nickel-coated carbon fibers, in a non-oxidizing environment, with a melt of a metal having a melting temperature lower than that of nickel; and solidifying the melt to a carbon fiber-reinforced metal body.
Claim 2
Independent Claim
98 words
The method of producing a carbon fiber-reinforced metal body which comprises the sequence of steps of enhancing the electrical conductivity of the carbon fibers by initially covering them with a copper coating having a thickness of from 20 to 100 A; completely covering the copper-coated surfaces of the carbon fibers with a uniform layer of nickel having a thickness not greater than 1 micron; surrounding said nickel-coated carbon fibers, in a non-oxidizing environment, with a melt of a metal having a melting temperature lower than that of nickel; and solidifying the melt to a carbon fiber-reinforced metal body.
Claim 3
Dependent Claim
24 words
The method of producing carbon fiber-reinforced metal as defined in claim 1 wherein said metallic melt is constituted by aluminum or an alloy thereof.
Claim 4
Dependent Claim
24 words
The method of producing carbon fiber-reinforced metal as defined in claim 1 wherein said metallic melt is constituted by copper or an alloy thereof.
Claim 5
Dependent Claim
24 words
The method of producing carbon fiber-reinforced metal as defined in claim 1 wherein said metallic melt is constituted by tin or an alloy thereof.
Claim 6
Dependent Claim
29 words
The method of producing carbon fiber-reinforced metal as defined in claim 1 wherein the nickel which covers the copper-coated carbon fibers has a thickness of less than 1 micron.
Claim 7
Dependent Claim
39 words
The method of producing carbon fiber-reinforced metal as defined in claim 1 wherein the step of surrounding the nickel coated carbon fibers with the metallic melt is carried out under a vacuum of at least 10 4 mm Hg.
Claim 8
Dependent Claim
22 words
The method of producing carbon fiber-reinforced metal as defined in claim 1 wherein the starting material for the carbon fibers is polyacrylic-nitrile.
References Cited (Backward Citations)
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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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |