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US4442165A
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Low-density thermally insulating carbon-carbon syntactic foam composite
Assignee: General Electric Co
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Filing: 1981-03-26
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Granted: 1984-04-10
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Expires: 2001-03-26
Abstract
Abstract A low-density, thermally insulating composite which is ablation resistant and impervious to gases and liquids. The composite is comprised of a carbon-carbon syntactic foam material which is covered and penetrated by pyrolytic carbon, in order to increase the strength of the foam material. Pyrolytic graphite is then deposited onto at least one surface of the pyrolytic carbon covered and penetrated foam material to improve the thermal insulation of the composite and render it impervious to gas or liquids.
Inventors
- 👤 Joseph J. Gebhardt
- 👤 Paul W. Juneau, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:05
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C04B35/515; C04B35/52; C04B35/522; C04B35/528; C04B35/532; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249956; Y10T428/249957; Y10T428/249967; Y10T428/249986; Y10T428/249987; Y10T428/24999; Y10T428/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
83 words
A low-density, thermally insulating composite comprising: (a) a reinforced, carbon-carbon syntactic foam material exhibiting low thermal conductivity and low density characteristics, said foam material further comprising a thermosetting resin matrix and a pyrolyzed mixture of carbon fibers and hollow carbon spheres within said thermosetting resin matrix; (b) pyrolytic carbon covering and penetrating into at least a portion of said foam material; and, (c) a layer of pyrolytic graphite on at least a portion of said pyrolytic carbon covered and penetrated syntactic foam material.
Claim 2
Dependent Claim
83 words
A low-density, thermally insulating composite comprising: (a) a reinforced, carbon-carbon syntactic foam material exhibiting low thermal conductivity and low density characteristics, said foam material further comprising a thermosetting resin matrix and a pyrolyzed mixture of carbon fibers and hollow carbon spheres within said thermosetting resin matrix; (b) pyrolytic carbon covering and penetrating into at least a portion of said foam material; and, (c) a layer of pyrolytic graphite on at least a portion of said pyrolytic carbon covered and penetrated syntactic foam material.
Claim 3
Dependent Claim
31 words
A low-density, thermally insulating composite according to claim 1, wherein said pyrolytic graphite layer includes less than approximately 0.2 percent by weight of boron, based upon the weight of the graphite.
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) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |