Patent DE295657C successfully refreshed from Google Patents.
Patent US4806428A successfully refreshed from Google Patents.
US4806428A
Expired / Lapsed
US
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Composite ceramic article and method for making it
Assignee: Corning Glass Works
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Filing: 1986-12-19
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Granted: 1989-02-21
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Expires: 2006-12-19
Abstract
Abstract Oxide-coated whiskers suitable for consolidation into or incorporation within a whisker-reinforced composite ceramic article are provided by dispersing inorganic whiskers in a colloidal oxide sol, separating the dispersion into fine droplets, and drying the droplets to provide a solid particulate product comprising the coated whiskers. The continuous oxide coating on the whiskers provides protection and aids in composite consolidation.
Inventors
- 👤 Reid F. Cooper
- 👤 Kishor P. Gadkaree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:30
CPC Classifications
C; C03; C03C; C03C14/00; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/117; C04B35/16; C04B35/18; C04B35/185; C04B35/195; C04B35/622; C04B35/626; C04B35/628; C04B35/62844; C04B35/62847; C04B35/62849; C04B35/62852; C04B35/62855; C04B35/62892; C04B35/62897; C04B35/64; C04B35/645; C04B35/71; C04B35/78; C04B35/80; C03C2214/00; C03C2214/06; C03C2214/32; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3208; C04B2235/3217; C04B2235/34; C04B2235/3418; C04B2235/44; C04B2235/441; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/522; C04B2235/5224; C04B2235/524; C04B2235/5244; C04B2235/5248; C04B2235/526; C04B2235/5276; C04B2235/70; C04B2235/96; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2907; Y10T428/2913; Y10T428/2918; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
Oxide-coated whisker wherein said coated whiskers have the form of a dried particulate material, said material comprising individual inorganic whiskers encapsulated in an oxide coating material, the oxide coating material consisting of an inorganic oxide or mixture of oxides selected from the group consisting of SiO 2 , Al 2 O 3 , CaO, BaO, ZrO 2 , TiO 2 , and P 2 O 5 , said oxides being present in unreacted form and forming a continuous oxide coating on the whiskers.
Claim 2
Dependent Claim
83 words
Oxide-coated whisker wherein said coated whiskers have the form of a dried particulate material, said material comprising individual inorganic whiskers encapsulated in an oxide coating material, the oxide coating material consisting of an inorganic oxide or mixture of oxides selected from the group consisting of SiO 2 , Al 2 O 3 , CaO, BaO, ZrO 2 , TiO 2 , and P 2 O 5 , said oxides being present in unreacted form and forming a continuous oxide coating on the whiskers.
Claim 3
Dependent Claim
31 words
Oxide-coated whiskers in accordance with claim 1 wherein the inorganic whiskers are whiskers selected from the group of SiC, Si 3 N 4 , C and Al 2 O 3 whiskers.
Claim 4
Dependent Claim
26 words
Oxide-coated whiskers in accordance with claim 2 wherein the dried particulate material has an average particle size less than the maximum length of the inorganic whiskers.
Claim 5
Dependent Claim
27 words
Oxide-coated whiskers in accordance with claim 3 wherein the thickness of the oxide coating material does not exceed about 3 times the diameter of the inorganic whiskers.
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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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |