Patent US1021822A successfully refreshed from Google Patents.
Patent US3853600A successfully refreshed from Google Patents.
US3853600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved carbon fiber reinforced composite article
Assignee: Celanese Corp
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Filing: 1973-02-28
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Granted: 1974-12-10
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Expires: 1993-02-28
Abstract
Abstract A process is provided for modifying the surface characteristics of a carbonaceous fibrous material (i.e., either amorphous carbon or graphitic carbon) and to thereby facilitate enhanced adhesion between the carbonaceous fibrous material and a matrix material. The carbonaceous fibrous material is coated with a compact polyphenylene polymer coating which is deposited thereon upon contact with an excited gas species generated by applying high frequency electrical energy in pulsed form to an inert gas in the presence of at least one aromatic compound. The coating step is efficiently conducted at a temperature of about 0* to 150*C. and at a pressure within the coating zone of about 1 to 3 atmospheres. Composite articles of enhanced interlaminar shear strength may be formed by incorporating the fibers modified in accordance with the present process in a resinous matrix material.
Inventors
- 👤 K Hou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:14
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/36; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/298; Y10T428/31504; Y10T428/31511; Y10T428/31721; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31859; Y10T428/31877; Y10T428/31909; Y10T428/31924; Y10T428/31928
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
42 words
A COMPOSITE ARTICLE EXHIBITING ENHANCED INTERLAMINAR SHEAR STRENGTH COMPRISING A RESINOUS MATRIX MATERIAL DERIVED FROM A THERMOSETTING RESIN HAVING INCORPORATED THEREIN A CARBONACEOUS FIBROUS MATERIAL CONTAINING AT LEAST 90 PER CENT CARBON BY WEIGHT WHICH BEARS UPON THE SURFACE OF SAID CARBO-
Claim 2
Dependent Claim
42 words
A COMPOSITE ARTICLE EXHIBITING ENHANCED INTERLAMINAR SHEAR STRENGTH COMPRISING A RESINOUS MATRIX MATERIAL DERIVED FROM A THERMOSETTING RESIN HAVING INCORPORATED THEREIN A CARBONACEOUS FIBROUS MATERIAL CONTAINING AT LEAST 90 PER CENT CARBON BY WEIGHT WHICH BEARS UPON THE SURFACE OF SAID CARBO-
Claim 3
Dependent Claim
42 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said resinous matrix material is derived from a polar thermosetting resin selected from the group consisting essentially of an epoxy, a polyimide, a polyester, and a phenolic resin.
Claim 4
Dependent Claim
27 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said carbonaceous fibrous material contains at least 95 per cent carbon by weight.
Claim 5
Dependent Claim
21 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said carbonaceous fibrous material includes graphitic carbon.
Claim 6
Dependent Claim
25 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said compact coating of a polyphenylene polymer is derived from benzene.
Claim 7
Dependent Claim
25 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said compact coating of a polyphenylene polymer is derived from toluene.
Claim 8
Dependent Claim
25 words
A composed article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said compact coating of a polyphenylene polymer is derived from styrene.
Claim 9
Dependent Claim
24 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said compact coating of polyphenylene polymer is derived from aniline.
Claim 10
Dependent Claim
30 words
A composite article exhibiting enhanced interlaminar shear strength in accordance with claim 1 wherein said compact coating of polyphenylene polymer has a thickness of about 50 to 250 angstrom units.
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |