US3737977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming ceramic-metal seal
Assignee: General Electric Co
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Filing: 1970-10-19
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Granted: 1973-06-12
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Expires: 1990-10-19
Abstract
Abstract An improved seal or bond between a refractory metal body and a translucent alumina ceramic body is disclosed wherein the metal surface to be bonded to the alumina body is comprised of zirconium, either as a metallic coating thereon, diffused therein by ''''metalliding,'''' as an alloying constituent, or as the major constituent of the metal body. The bond is effected by means of an alumina glass between the zirconium present at the surface and the adjoining alumina ceramic surface, at least a portion of the zirconium being oxidized by the molten glass during the formation of the seal.
Inventors
- 👤 P Jorgensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:28
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/025; C04B37/026; H; H01; H01J; H01J61/00; H01J61/02; H01J61/36; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/064; C04B2237/068; C04B2237/10; C04B2237/12; C04B2237/122; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/403; C04B2237/50; C04B2237/62; C04B2237/70; C04B2237/706; C04B2237/72; C04B2237/76; C04B2237/765; C04B2237/88; Y; Y10; Y10S; Y10S228/00; Y10S228/903; Y10T; Y10T403/00; Y10T403/47; Y10T403/477
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
The method of claim 1 wherein the zirconided layer has an overlying layer of substantially pure zirconium.
Claim 2
Dependent Claim
14 words
The method of claim 1 wherein the sealing glass is predominantly formed of alumina.
References Cited (Backward Citations)
US3281309A
Cited
US3243635A
Cited
US3385463A
Cited
US3473071A
Cited
US3370874A
Cited
US3479170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |