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US4373003A
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US
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High temperature silicon carbide impregnated insulating fabrics
Assignee: National Aeronautics and Space Administration
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Filing: 1982-04-06
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Granted: 1983-02-08
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Expires: 2002-04-06
Abstract
Abstract High temperature insulating articles are provided having improved performance characteristics. The articles comprise fabrics of closely woven refractory or heat resistant fibers having particles of silicon carbide dispersed at least partially through the fabric and bonded to the fibers with an emulsifiable polyethylene wax. Such articles exhibit significantly increased high temperature emittance characteristics and an improved retention of integrity and flexibility after prolonged exposure to high temperature.
Inventors
- 👤 Calvin Schomburg
- 👤 Robert L. Dotts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:04
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/52; B64G1/58; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S428/913; Y10S428/92; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2926
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A high temperature insulating article comprising a fabric of closely woven heat resistant fibers having particles of silicon carbide dispersed at least partially throughout the fabric and bonded to the fibers with an emulsifiable polyethylene wax having free carboxyl groups and having a molecular weight of from about 1,500 to about 6,000 and an acid number of from about 2 to about 50.
Claim 2
Dependent Claim
63 words
A high temperature insulating article comprising a fabric of closely woven heat resistant fibers having particles of silicon carbide dispersed at least partially throughout the fabric and bonded to the fibers with an emulsifiable polyethylene wax having free carboxyl groups and having a molecular weight of from about 1,500 to about 6,000 and an acid number of from about 2 to about 50.
Claim 3
Dependent Claim
16 words
The article of claim 1 wherein the particles of silicon carbide are dispersed throughout the fabric.
Claim 4
Dependent Claim
32 words
The article of claim 1 wherein the emulsifiable polyethylene wax has a molecular weight of from about 2,000 to about 2,500 and an acid number of from about 7 to about 50.
Claim 5
Dependent Claim
13 words
The article of claims 1 or 3 wherein the fibers are silica fibers.
Claim 6
Dependent Claim
14 words
The article of claims 1 or 3 wherein the fibers are alumina borosilicate fibers.
Claim 7
Dependent Claim
32 words
The article of claim 1 wherein the fabric contains from about 0.003 to about 0.02 gram of the combination of silicon carbide particles and polyethylene wax per square centimeter of fabric surface.
Claim 8
Dependent Claim
31 words
The article of claim 6 wherein the emulsifiable wax has a molecular weight of from about 2,000 to about 2,500 and an acid number of from about 7 to about 50.
Claim 9
Dependent Claim
20 words
The article of claim 7 wherein the silicon carbide particles are of a size to pass a 1,000 mesh screen.
Claim 10
Dependent Claim
11 words
The article of claim 8 wherein the fibers are silica fibers.
Claim 11
Dependent Claim
12 words
The article of claim 8 wherein the fibers are alumina borosilicate fibers.
References Cited (Backward Citations)
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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) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |