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US5288438A
Expired / Lapsed
US
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Carborane catalyzed graphitization of polyarylacetylene (PAA)
Assignee: Aerospace Corp
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Filing: 1991-11-22
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Granted: 1994-02-22
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Expires: 2011-11-22
Abstract
Abstract Carborane is used to catalyze the graphitization of polyarylacetylene (PAA) in order to form a uniform matrix microstructure both in bulk and as a composite matrix.
Inventors
- 👤 Ross W. Kobayashi
- 👤 Rafael de J. Zaldivar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:59
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A process for producing a carbon-carbon composite comprising a carbon matrix reinforced by carbon fibers, the method comprises the steps of: a. preparing the matrix from a blend of polyarylacetylene (PAA) and carborane (C 2 B 10 H 12 ) in a concentration of 1 to 5 boron weight percent solution in a solvent; b. orienting the carbon fibers within the blend to provide a precursor for the carbon-carbon composite; and c. curing and heat treating the precursor in a non-reactive atmosphere up to 2500 degrees Centigrade to produce the carbon-carbon composite.
Claim 2
Dependent Claim
92 words
A process for producing a carbon-carbon composite comprising a carbon matrix reinforced by carbon fibers, the method comprises the steps of: a. preparing the matrix from a blend of polyarylacetylene (PAA) and carborane (C 2 B 10 H 12 ) in a concentration of 1 to 5 boron weight percent solution in a solvent; b. orienting the carbon fibers within the blend to provide a precursor for the carbon-carbon composite; and c. curing and heat treating the precursor in a non-reactive atmosphere up to 2500 degrees Centigrade to produce the carbon-carbon composite.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |