Patent US4609631A successfully refreshed from Google Patents.
US4609631A
Expired / Lapsed
US
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Oxynitride glass fibers
Assignee: United States Department of the Army
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Filing: 1985-09-12
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Granted: 1986-09-02
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Expires: 2005-09-12
Abstract
Abstract This invention relates to the production of high elastic modulus, high strength, corrosion-resistant oxynitride glass fibers for improved fiber-reinforced composites. The incorporation of nitrogen into silicon-yttrium-aluminum oxide glasses enhances the properties of bulk glass. This invention is the first demonstration that such glasses can be made into fibers. The addition of nitrogen to practically any oxide glass fiber composition will produce improvements in properties similar to those shown for the silicon-yttrium-aluminum system.
Inventors
- 👤 Donald R. Messier
- 👤 Eileen J. DeGuire
- 👤 R. Nathan Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:23
CPC Classifications
C; C03; C03C; C03C13/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
32 words
A fiber drawn from an oxynitride glass, said fiber having an elastic modulus in the range from 140 GPa to 185 GPa, wherein said fiber comprises up to 15 atomic percent nitrogen.
Claim 2
Dependent Claim
32 words
A fiber drawn from an oxynitride glass, said fiber having an elastic modulus in the range from 140 GPa to 185 GPa, wherein said fiber comprises up to 15 atomic percent nitrogen.
Claim 3
Dependent Claim
13 words
A fiber according to claim 1 wherein the glass is a Si--Y--Al--O--N glass.
Claim 4
Dependent Claim
35 words
A fiber according to claim 2 that is formed from a raw batch powder mixture of Al 2 O 3 , Si 3 N 4 , SiO 2 , and Y 2 O 3 .
Claim 5
Dependent Claim
26 words
A fiber according to claim 2 that is formed from a raw batch powder mixture of AlN, SiO 2 , and Y 2 O 3 .
Claim 6
Dependent Claim
29 words
A fiber according to claim 1 wherein said fiber has a diameter in the range from 0.17 mm at a first end to 2.04 mm at a second end.
References Cited (Backward Citations)
US3360386A
Cited
US3620787A
Cited
US3785836A
Cited
US3999835A
Cited
US4186021A
Cited
US4203744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |