US4393101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diethynylbenzene-ethynylpyrene copolymers
Assignee: United States Department of the Air Force
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Filing: 1982-06-11
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Granted: 1983-07-12
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Expires: 2002-06-11
Abstract
Abstract A high char yielding matrix resin for use in fabricating carbon-carbon composites comprised of a polymerizable mixture of a diethynylbenzene monomer and an ethynylpyrene monomer.
Inventors
- 👤 Norman Bilow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:03
CPC Classifications
C; C08; C08F; C08F238/00; F; F02; F02K; F02K9/00; F02K9/97; F02K9/974
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A method for the production of a resinous impregnated carbon-carbon composite ablative material which comprises the steps of (1) forming an interwoven graphite fiber structure, (2) impregnating said structure with a matrix resinous precursor composed of a polymerizable mixture of diethynylbenzene and ethynylpyrene, (3) heating said impregnated structure at a temperature and for a period of time sufficient to effect the copolymerization of said mixture (4) further heating said polymerized structure at a temperature, pressure and period of time sufficient to pyrolyze said structure (5) graphitizing said pyrolized structure and (6) recovering the resulting carbon-carbon composite structure.
Claim 2
Independent Claim
97 words
A method for the production of a resinous impregnated carbon-carbon composite ablative material which comprises the steps of (1) forming an interwoven graphite fiber structure, (2) impregnating said structure with a matrix resinous precursor composed of a polymerizable mixture of diethynylbenzene and ethynylpyrene, (3) heating said impregnated structure at a temperature and for a period of time sufficient to effect the copolymerization of said mixture (4) further heating said polymerized structure at a temperature, pressure and period of time sufficient to pyrolyze said structure (5) graphitizing said pyrolized structure and (6) recovering the resulting carbon-carbon composite structure.
References Cited (Backward Citations)
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Cited
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US3926897A
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US3926907A
Cited
US3993711A
Cited
US4215161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |