US3860529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized tetragonal zirconia fibers and textiles
Assignee: Union Carbide Corp
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Filing: 1972-05-01
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Granted: 1975-01-14
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Expires: 1992-05-01
Abstract
Abstract Zirconia fibers and textiles that are stabilized in the tetragonal form by small, carefully controlled amount of oxides of the metals of Group III B of the Periodic Table. The stabilized tetragonal zirconia fibers and textiles are useful as refractories, thermal insulators, battery spacers, fuel cell spacers, and the like.
Inventors
- 👤 Bernard H Hamling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:20
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/02; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; C04B35/6225; D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/45; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/431; H01M50/434; H01M50/44; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2002/54; C01P2004/00; C01P2004/10; C01P2006/00; C01P2006/21; C01P2006/32; C01P2006/33; C01P2006/36; D06M2101/00; D06M2101/02; D06M2101/04; D06M2101/06; D06M2200/00; D06M2200/30; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
57 words
The fibrous zirconia of claim 1 wherein said Group III B metal oxide is (a) from about 5 to about 20 weight percent of ceria, based upon weight of zirconia plus ceria, or (b) from about 5 to about 20 weight percent of mixed rare earth oxides, based upon weight of zirconia plus mixed rare earth oxides.
Claim 2
Dependent Claim
24 words
The fibrous zirconia of claim 1 wherein said fibrous zirconia is in the form of yarn, monofilament, knitted fabric, woven fabric, or non-woven fabric.
Claim 3
Dependent Claim
24 words
The fibrous zirconia of claim 2 wherein said fibrous zirconia is in the form of yarn, monofilament, knitted fabric, woven fabric, or non-woven fabric.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |