US4719151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated ceramic structure
Assignee: Corning Glass Works
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Filing: 1986-05-09
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Granted: 1988-01-12
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Expires: 2006-05-09
Abstract
Abstract There is disclosed a laminated ceramic structure including a facing member and a backing member, the two members being bonded together either directly or through an intermediate layer, the facing member being formed from a very hard ceramic such as a carbide having a KHN 100 value in excess of 1000 kg/mm 2 , the backing member being a glass or glass-ceramic matrix having an enhanced capability or absorbing impact energy, preferably being fiber reinforced and having an energy absorbing capacity in excess of 10 KJ/m 2 .
Inventors
- 👤 Kenneth Chyung
- 👤 Reid F. Cooper
- 👤 Kishor P. Gadkaree
- 👤 Ronald L. Stewart
- 👤 Mark P. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:49
CPC Classifications
F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0414; F41H5/0428; F41H5/0435; C; C03; C03C; C03C14/00; C03C14/002; C03C27/00; C03C27/06; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/645; C04B37/00; C04B37/001; C04B37/003; C04B37/005; C04B37/04; C04B37/042; C03C2214/00; C03C2214/02; C03C2214/20; C04B2235/00; C04B2235/02; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5216; C04B2235/524; C04B2235/5244; C04B2235/5248; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2235/658; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/365; C04B2237/38; C04B2237/50; C04B2237/70; C04B2237/704; C04B37/045; Y; Y10; Y10S; Y10S428/00; Y10S428/911
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
105 words
A laminated ceramic structure comprising a facing member bonded to a backing member, the facing member being composed of a very hard ceramic having a KHN 100 value in excess of 700 kg/mm 2 selected from the group consisting of SiC, B 4 C, TiB 2 , SiON, and Al 2 O 3 , each in monolithic form, and a glass-ceramic reinforced through the presence therein of whiskers, and the backing member being a composite having an impact energy absorbing capacity in excess of 10 KJ/m 2 in an unnotched condition composed of a glass or glass-ceramic matrix reinforced through the presence therein of fibers.
Claim 2
Dependent Claim
105 words
A laminated ceramic structure comprising a facing member bonded to a backing member, the facing member being composed of a very hard ceramic having a KHN 100 value in excess of 700 kg/mm 2 selected from the group consisting of SiC, B 4 C, TiB 2 , SiON, and Al 2 O 3 , each in monolithic form, and a glass-ceramic reinforced through the presence therein of whiskers, and the backing member being a composite having an impact energy absorbing capacity in excess of 10 KJ/m 2 in an unnotched condition composed of a glass or glass-ceramic matrix reinforced through the presence therein of fibers.
Claim 3
Dependent Claim
22 words
A laminated ceramic structure in accord with claim 1 wherein the facing member is bonded with the backing member by hot pressing.
Claim 4
Dependent Claim
24 words
A laminated ceramic structure in accord with claim 1 wherein the facing and backing members are bonded at least one layer of intermediate material.
Claim 5
Dependent Claim
16 words
A laminated ceramic structure in accord with claim 3 wherein the intermediate is a sealing glass.
Claim 6
Dependent Claim
27 words
A laminated ceramic structure in accord with claim 3 wherein the intermediate has a thermal coeffi of expansion intermediate to that of the facing and backing members.
Claim 7
Dependent Claim
26 words
A laminated ceramic structure in accordance with claim 1 wherein the backing member is a glass or glass-ceramic reinforced with graphite, carbon, or silicon carbide fibers.
Claim 8
Dependent Claim
20 words
A laminated ceramic structure in accordance with claim 6 wherein the backing member is composed of a fiber-reinforced aluminosilicate glass.
Claim 9
Dependent Claim
29 words
A laminated ceramic structure in accordance with claim 1 wherein the KHN 100 value of the facing member is in the range of 700 to 3000 kg./mm 2 .
Claim 10
Dependent Claim
23 words
A laminated ceramic structure in accordance with claim 8 wherein the range of KHN 100 values is 2000 to 3000 kg./mm 2 .
Claim 11
Dependent Claim
28 words
A laminated ceramic structure in accordance with claim 1 wherein the impact energy absorbing capacity of the backing member is in the range of 10-40 KJ/m 2 .
Claim 12
Dependent Claim
25 words
A laminated ceramic structure in accordance with claim 10 wherein the backing member has a typical impact energy absorbing value of 20-30 KJ/m. 2 .
Claim 13
Dependent Claim
29 words
A laminated ceramic structure in accordance with claim 1 wherein the faceplate and backing member have thermal coefficients of expansion that differ by no more than 20×10 -7 /°C.
Claim 14
Dependent Claim
29 words
A laminated ceramic structure in accordance with claim 1 wherein the facing member is composed of a whisker reinforced glass-ceramic and the backing member is a fiber reinforced glass-ceramic
Claim 15
Dependent Claim
30 words
A laminated ceramic structure in accordance with claim 13 wherein the facing member is reinforced with SiC whiskers and the backing member is reinforced with graphite, carbon, or SiC fibers.
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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) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |