US4567110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature brazed ceramic joints
Assignee: Massachusetts Institute of Technology
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Filing: 1981-07-17
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Granted: 1986-01-28
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Expires: 2001-07-17
Abstract
Abstract High-temperature joints formed from metallized ceramics are disclosed wherein the metal coatings on the ceramics are vacuum sputtered thereon.
Inventors
- 👤 Philip O. Jarvinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:09
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C04B41/88; B; B23; B23K; B23K35/00; B23K35/001; C04B37/00; C04B37/003; C04B37/006; C04B37/02; C04B37/023; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/5133; C04B41/5144; C04B2235/00; C04B2235/70; C04B2235/96; C04B2235/963; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/123; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/343; C04B2237/36; C04B2237/365; C04B2237/50; C04B2237/52; C04B2237/72; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12611; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/1284; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
36 words
In the formation of a brazed ceramic joint suitable for use at temperatures over 1,000° C., the improvement of employing a metallized ceramic produced by vacuum sputtering substantially pure unalloyed nickel onto an aluminum oxide ceramic.
Claim 2
Dependent Claim
36 words
In the formation of a brazed ceramic joint suitable for use at temperatures over 1,000° C., the improvement of employing a metallized ceramic produced by vacuum sputtering substantially pure unalloyed nickel onto an aluminum oxide ceramic.
Claim 3
Dependent Claim
11 words
A brazed ceramic joint formed by the improvement of claim 1.
Claim 4
Dependent Claim
35 words
In the formation of a brazed ceramic joint, the improvement of employing a metallized ceramic produced by vacuum sputtering tungsten onto a silicon carbide ceramic having a surface roughness of at least about 30 microinches.
Claim 5
Dependent Claim
35 words
In the formation of a brazed ceramic joint, the improvement of employing a metallized ceramic produced by vacuum sputtering tungsten onto a silicon carbide ceramic having a surface roughness of at least about 30 microinches.
Claim 6
Dependent Claim
11 words
A brazed ceramic joint formed by the improvement of claim 3.
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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |