Patent US4396669A successfully refreshed from Google Patents.
US4396669A
Expired / Lapsed
US
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Composite carbonaceous articles and process for making same
Assignee: CARBONE USA Corp A CORP OF N J
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Filing: 1980-08-22
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Granted: 1983-08-02
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Expires: 2000-08-22
Abstract
Abstract Disclosed is a composite carbonaceous article formed of carbon felt fabric intimately linked to vitreous carbon. A carbonizable high carbon resin is cast or centrifuged onto a carbon or precursor felt fabric to form shapes which can then be baked to carbonizing or graphitizing temperatures.
Inventors
- 👤 Yvon P. Cariou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:10
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C04B35/515; C04B35/52; C04B35/524; H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; H01M8/00; H01M8/02; H01M8/0202; H01M8/0204; H01M8/0213; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T428/00; Y10T428/30; Y10T442/00; Y10T442/50; Y10T442/59
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
102 words
A composite multi-layered carbonaceous article comprising: a felted fabric member having at least two surfaces and being composed of carbon fibers, a layer of vitreous carbon being bonded to at least one of said surfaces to be completely located only at that surface to form two distinct layers which are bonded together; said vitreous carbon having been produced by polymerizing on said fabric a carbonizable, polymerizable resin having a carbon content in the range of 40 to 90 percent, said layer having a closed microporosity and being gas impervious; only some of said carbon fibers penetrating into said layer of vitreous carbon.
Claim 2
Dependent Claim
102 words
A composite multi-layered carbonaceous article comprising: a felted fabric member having at least two surfaces and being composed of carbon fibers, a layer of vitreous carbon being bonded to at least one of said surfaces to be completely located only at that surface to form two distinct layers which are bonded together; said vitreous carbon having been produced by polymerizing on said fabric a carbonizable, polymerizable resin having a carbon content in the range of 40 to 90 percent, said layer having a closed microporosity and being gas impervious; only some of said carbon fibers penetrating into said layer of vitreous carbon.
Claim 3
Dependent Claim
24 words
The article of claim 1, wherein alternate layers of fabric members and layers of vitreous carbon are integrally united to form a sandwich-like structure.
Claim 4
Dependent Claim
18 words
The article of claim 1, wherein said carbon fibers have a diameter of about four to eight microns.
Claim 5
Dependent Claim
45 words
The article of claim 1, wherein said vitreous carbon has a thermal conductivity ranging from 0.01 to 0.02 cal/cm/s/C and a transverse breaking strength of 600 to 1000 kg/cm 2 , and said fibers have a carbon content in the range of 94 to 100%.
Claim 6
Dependent Claim
14 words
The article of claim 1, wherein said vitreous carbon and said fibers are graphitized.
Claim 7
Dependent Claim
88 words
A process for making a shaped composite multi-layered carbonaceous article comprising providing a felted fabric composed of carbon fibers, said fabric having at least two surfaces, bonding a carbonizable, polymerizable resin having a carbon content in the range of 40 to 90% and a polymerization catalyst to at least one of said surfaces under ambient temperature and pressure by polymerizing said resin to carbonizing or graphitizing temperatures so that said carbon is completely located only at the one surface to form two distinct layers which are bonded together.
Claim 8
Dependent Claim
88 words
A process for making a shaped composite multi-layered carbonaceous article comprising providing a felted fabric composed of carbon fibers, said fabric having at least two surfaces, bonding a carbonizable, polymerizable resin having a carbon content in the range of 40 to 90% and a polymerization catalyst to at least one of said surfaces under ambient temperature and pressure by polymerizing said resin to carbonizing or graphitizing temperatures so that said carbon is completely located only at the one surface to form two distinct layers which are bonded together.
Claim 9
Dependent Claim
19 words
The process of claim 6, wherein said resin is a furfural-based resin, a phenolic resin or a polyimide resin.
Claim 10
Dependent Claim
25 words
The process of claim 6, wherein the amount of resin applied to said fabric ranges from 0.1 to 2.0 gram per cm 2 of fabric.
Claim 11
Dependent Claim
30 words
The process of claim 6, wherein a thickness of resin of 2/10 to 2.5 mm is used and the temperature is increased at a rate of 3° to 5° C./hr.
Claim 12
Dependent Claim
26 words
The process of claim 6, wherein the thickness of resin used is over 2.5 mm and the rate of heating is increased by about 1° C./hr.
Claim 13
Dependent Claim
30 words
The process of claim 6, conducted by stacking a plurality of composite articles in a furnace, separating said articles by rigid, flat, separating means and heating to the desired temperature.
Claim 14
Dependent Claim
27 words
The process of claim 6, wherein contacting of said resin is effected by casting said resin on a substantially flat, rigid surface and placing said fabric thereon.
Claim 15
Dependent Claim
35 words
The process of claim 6, wherein contacting is conducted by centrifuging a roll of said fabric with said resin, heating to the polymerization temperature of said resin, unrolling the thus treated roll and baking same.
Claim 16
Dependent Claim
17 words
The process of claim 6, wherein said fabric is precarbonized prior to being applied to said resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |