US4341835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Macrofilament-reinforced composites
Assignee: Corning Glass Works
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Filing: 1981-01-26
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Granted: 1982-07-27
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Expires: 2001-01-26
Abstract
Abstract Composite materials consisting of a matrix incorporating high-aspect-ratio reinforcement members, wherein the reinforcement members consist of relatively large, prestressed glass or glass-ceramic members, such as macrofilaments or rods having diameters in excess of about 0.010 inches, are described.
Inventors
- 👤 John F. MacDowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:24
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/07; C; C04; C04B; C04B14/00; C04B14/38; C04B14/42; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/249932; Y10T428/24994; Y10T428/26; Y10T428/268; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/298; Y10T428/31; Y10T428/315; Y10T428/31504; Y10T428/31507; Y10T428/31511; Y10T428/31525; Y10T428/31551; Y10T428/31598; Y10T428/31601; Y10T428/31609; Y10T428/31612; Y10T428/31627; Y10T428/31645
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
A composite article comprising a matrix phase and a high-aspect-ratio reinforcing phase, wherein the high-aspect-ratio reinforcing phase consists of multiple elongated, prestressed glass or glass-ceramic members having a minimum thickness in the range of about 0.010-1.00 inches, a minimum length: thickness ratio of at least about 10:1, and compressively stressed surface layers imparting to each of said members an abraded flexural modulus of rupture strength of at least 100,000 psi.
Claim 2
Dependent Claim
70 words
A composite article comprising a matrix phase and a high-aspect-ratio reinforcing phase, wherein the high-aspect-ratio reinforcing phase consists of multiple elongated, prestressed glass or glass-ceramic members having a minimum thickness in the range of about 0.010-1.00 inches, a minimum length: thickness ratio of at least about 10:1, and compressively stressed surface layers imparting to each of said members an abraded flexural modulus of rupture strength of at least 100,000 psi.
Claim 3
Dependent Claim
31 words
A composite article in accordance with claim 1 wherein the prestressed glass or glass-ceramic members are glass or glass-ceramic macrofilaments or rods having a diameter in the range of 0.010-0.100 inches.
Claim 4
Dependent Claim
85 words
A composite article in accordance with claim 2 wherein the prestressed members are composed of an alkali aluminosilicate glass comprising 5-25% of an alkali metal oxide selected from the group consisting of Li 2 O, Na 2 O and K 2 O, 5-35% of Al 2 O 3 , and at least 80% total of alkali metal oxides+Al 2 O 3 +SiO 2 by weight, and incorporate compressive surface layers wherein relatively large alkali metal ions have been substituted for relatively small alkali metal ions.
Claim 5
Dependent Claim
24 words
A composite article in accordance with claim 2 wherein the prestressed members are composed of a nepheline glass-ceramic and incorporate compressive kalsilite surface layers.
Claim 6
Dependent Claim
16 words
A composite article in accordance with claim 2 wherein the matrix phase is composed of plastic.
Claim 7
Dependent Claim
15 words
A composite article in accordance with claim 2 wherein the matrix phase comprises a cement.
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) | 1985-07-26 | 1986-01-25 | 1986-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-26 | 1990-01-25 | 1990-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-26 | 1994-01-25 | 1994-07-27 | $7700.00 | Window Closed / Lapsed |