US3239323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for sealing ceramics
Assignee: General Electric Co
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Filing: 1961-06-28
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Granted: 1966-03-08
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Expires: 1981-06-28
Abstract
Abstract An integral ceramic body is formed by abutting two or more shapes of identical composition composed of one or more of alumina, magnesia and Berrylia with a continuous layer of powder of the same composition interposed between the mating surfaces of each pair of shapes, pressing and firing under pressure the whole assembly until an integral joint, preferably also vacuum-tight, is obtained. Firing can be in hydrogen.
Inventors
- 👤 Robert C Folweiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:38
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/003; C04B37/005; C04B35/00; C04B35/01; C04B35/10; C04B35/622; C04B35/64; C04B35/645; C04B2235/00; C04B2235/60; C04B2235/604; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2235/658; C04B2235/6582; C04B2235/6588; C04B2235/66; C04B2235/661; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/064; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/50; C04B2237/70; C04B2237/704; C04B2237/708; C04B2237/74; C04B2237/76; C04B2237/765; C04B2237/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A METHOD FOR JOINING CERAMIC BODIES OF THE SAME COMPOSITION HAVING THE SAME COMPONENT PARTS, EACH BODY BEING COMPOSED OF A METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE, MAGNESIUM OXIDE, BERYLLIUM OXIDE OR COMBINATIONS THEREOF, COMPRISING ASSEMBLING MATING SURFACES OF THE BODIES IN CONJOINT RELATIONSHIP DEFINING A JUNCTURE SURFACE, APPLYING A CONTINUOUS COATING OF NOT MORE THAN ABOUT 100 MILS THICKNESS OF A POWDER HAVING THE SAME COMPOSITION AND THE SAME COMPONENT PARTS AS THE CERAMIC BODIES TO ONE OF THE MATING SURFACES PRIOR TO ASSEMBLY, EXERTING PRESSURE ON THE BODIES TO COMPRESS THE POWDER COATING AT THE JUNCTURE SURFACE, AND FIRING THE ASSEMBLED BODIES AT A TEMPERATURE OF FROM ABOUT 1800*C. TO 1900*C. IN A HYDROGEN ATMOSPHERE HAVING A DEW POINT NOT HIGHER THAN ABOUT -40*F. FOR TIMES NOT LESS THAN ABOUT 100 MINUTES TO FORM AN INTEGRAL JOINT THEREBETWEEN.
Claim 2
Independent Claim
144 words
A METHOD FOR JOINING CERAMIC BODIES OF THE SAME COMPOSITION HAVING THE SAME COMPONENT PARTS, EACH BODY BEING COMPOSED OF A METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE, MAGNESIUM OXIDE, BERYLLIUM OXIDE OR COMBINATIONS THEREOF, COMPRISING ASSEMBLING MATING SURFACES OF THE BODIES IN CONJOINT RELATIONSHIP DEFINING A JUNCTURE SURFACE, APPLYING A CONTINUOUS COATING OF NOT MORE THAN ABOUT 100 MILS THICKNESS OF A POWDER HAVING THE SAME COMPOSITION AND THE SAME COMPONENT PARTS AS THE CERAMIC BODIES TO ONE OF THE MATING SURFACES PRIOR TO ASSEMBLY, EXERTING PRESSURE ON THE BODIES TO COMPRESS THE POWDER COATING AT THE JUNCTURE SURFACE, AND FIRING THE ASSEMBLED BODIES AT A TEMPERATURE OF FROM ABOUT 1800*C. TO 1900*C. IN A HYDROGEN ATMOSPHERE HAVING A DEW POINT NOT HIGHER THAN ABOUT -40*F. FOR TIMES NOT LESS THAN ABOUT 100 MINUTES TO FORM AN INTEGRAL JOINT THEREBETWEEN.
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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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |