US5368940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon composite material reinforced with carbon fiber and inorganic fiber
Assignee: Ohwada Carbon Industrial Co Ltd
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Filing: 1993-09-20
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Granted: 1994-11-29
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Expires: 2013-09-20
Abstract
Abstract A carbon composite material reinforced with a carbon fiber and an inorganic fiber. The composite material has a core formed of a carbon fiber-reinforced carbon composite comprising a carbon fiber reinforcement and a carbon matrix, The core is externally covered with an inorganic fiber-reinforced carbon composite comprising an inorganic fiber reinforcement, other than carbon, and a matrix composed either of carbon alone or a mixture of carbon and boride. This provides for sound and steady protection against oxidation, as well as for retention of high strength in an oxidizing atmosphere at high temperatures.
Inventors
- 👤 Makoto Takei
- 👤 Isao Kinugawa
- 👤 Mamoru Tamura
- 👤 Seiichi Tashiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:17
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B41/00; C04B41/009; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C04B41/45; C04B41/4596; C04B41/52; C04B41/80; C04B41/81; C04B41/89; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2918; Y10T428/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
62 words
A carbon composite material reinforced with a carbon fiber and an inorganic fiber, comprising a core formed of a carbon fiber-reinforced carbon composite comprising a carbon fiber reinforcement and a carbon matrix which does not contain a boron compound, said core being externally covered with an inorganic fiber-reinforced carbon composite comprising an inorganic fiber reinforcement, other than carbon, and a carbon matrix.
Claim 2
Dependent Claim
62 words
A carbon composite material reinforced with a carbon fiber and an inorganic fiber, comprising a core formed of a carbon fiber-reinforced carbon composite comprising a carbon fiber reinforcement and a carbon matrix which does not contain a boron compound, said core being externally covered with an inorganic fiber-reinforced carbon composite comprising an inorganic fiber reinforcement, other than carbon, and a carbon matrix.
Claim 3
Dependent Claim
91 words
A carbon composite material reinforced with a carbon fiber and an inorganic fiber as set forth in claim 1, further comprising an oxidation resistant material layer formed on the surface of said composite material and/or on the surface of internal pores thereof, said layer being of at least one kind of material selected from the group consisting of SiC, TiC, B 4 C, WC, TaC, Al 3 C 4 , Al 2 O 3 , Si 3 N 4 , BN, HfB 2 , AlN, ZrB 2 , NbC, and ZrC.
Claim 4
Dependent Claim
68 words
A carbon composite material reinforced with a carbon fiber and an inorganic fiber, comprising a core formed of a carbon fiber-reinforced carbon composite comprising a carbon fiber reinforcement and a carbon matrix which does not contain a boron compound, said core being externally covered with an inorganic fiber-reinforced carbon composite comprising an inorganic fiber reinforcement, other than carbon, and a matrix of a mixture of carbon and boride.
Claim 5
Dependent Claim
68 words
A carbon composite material reinforced with a carbon fiber and an inorganic fiber, comprising a core formed of a carbon fiber-reinforced carbon composite comprising a carbon fiber reinforcement and a carbon matrix which does not contain a boron compound, said core being externally covered with an inorganic fiber-reinforced carbon composite comprising an inorganic fiber reinforcement, other than carbon, and a matrix of a mixture of carbon and boride.
Claim 6
Dependent Claim
91 words
A carbon composite material reinforced with a carbon fiber and an inorganic fiber as set forth in claim 3, further comprising an oxidation resistant material layer formed on the surface of said composite material and/or on the surface of internal pores thereof, said layer being of at least one kind of material selected from the group consisting of SiC, TiC, B 4 C, WC, TaC, Al 3 C 4 , Al 2 O 3 , Si 3 N 4 , BN, HfB 2 , AlN, ZrB 2 , NbC, and ZrC.
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) | 1997-11-28 | 1998-05-30 | 1998-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-28 | 2002-05-30 | 2002-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-28 | 2006-05-30 | 2006-11-29 | $7700.00 | Window Closed / Lapsed |