US3663182A
Expired / Lapsed
US
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Metal oxide fabrics
Assignee: Union Carbide Corp
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Filing: 1968-03-29
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Granted: 1972-05-16
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Expires: 1988-03-29
Abstract
Abstract The specification discloses fabrics that are composed of metal oxides such as zirconia, tantala, and other metal oxides which have not heretofore been available in the form of fabrics. The metal oxide fabrics of this invention are characterized by being relatively flexible and strong, as well as exhibiting the desirable high temperature and chemical resistance properties that are typical of materials such as zirconia and tantala. The metal oxide fabrics of the invention are useful as battery separators, fuel cell separators, in high temperature insulation, and the like.
Inventors
- 👤 Bernard H Hamling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:44
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; Y; Y10; Y10S; Y10S376/00; Y10S376/90; Y10T; Y10T428/00; Y10T428/26; Y10T428/268; Y10T442/00; Y10T442/30; Y10T442/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
16 words
The metal oxide fabric of claim 1 wherein said metal oxide fabric is composed of zirconia.
Claim 2
Dependent Claim
16 words
The metal oxide fabric of claim 1 wherein said metal oxide fabric is composed of alumina.
Claim 3
Dependent Claim
16 words
The metal oxide fabric of claim 1 wherein said metal oxide fabric is composed of tantala.
Claim 4
Dependent Claim
17 words
The zirconia fabric of claim 2 wherein said fabric is in the form of a woven fabric.
Claim 5
Dependent Claim
26 words
The zirconia fabric of claim 2 wherein said fabric is in the form of a non-woven fabric having at least some of the individual fibers interlocked.
Claim 6
Dependent Claim
16 words
The zirconia fabric of claim 6 wherein said fabric is in the form of a felt.
Claim 7
Dependent Claim
18 words
The zirconia fabric of claim 2 wherein the zirconia in said fabric is in the cubic crystallographic phase.
Claim 8
Dependent Claim
27 words
The zirconia fabric of claim 8 wherein said zirconia contains from about 5.52 to about 9.57 mole per cent yttria, based upon moles of yttria plus zirconia.
Claim 9
Dependent Claim
57 words
A thoria fabric composed of interlocked thoria fibers, said fabric being capable of withstanding compression loads of at least about 25 pounds per square inch, and said fibers being composed of thoria in the microcrystalline form, the individual crystallites of which have a size not exceeding one-tenth of the diameter of the individual fibers of said fabric.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |