US3331731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and article formed by sealing alumina ceramic to a metal with a sealant glass
Assignee: OI Glass Inc
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Filing: 1962-11-14
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Granted: 1967-07-18
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Expires: 1982-11-14
Abstract
No abstract record available.
Inventors
- 👤 Nils Tryggve E A Baak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:03
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2237/00; C04B2237/02; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/403; C04B2237/50; C04B2237/76; C04B2237/765
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
AN ARTICLE COMPRISING AN ALUMINA CERAMIC PART AND A GLASS PART, SAID GLASS PART BEING SEALED DIRECTLY TO SAID CERAMIC PART, THE GLASS CONSISTING ESSENTIALLY OF 53-63 WEIGHT PERCENT SIO2, 8-15 WEIGHT PERCENT AL2O3, 20-32 WEIGHT PERCENT CAO AND 5.5-9.5 WEIGHT PERCENT CAF2.
Claim 2
Dependent Claim
43 words
AN ARTICLE COMPRISING AN ALUMINA CERAMIC PART AND A GLASS PART, SAID GLASS PART BEING SEALED DIRECTLY TO SAID CERAMIC PART, THE GLASS CONSISTING ESSENTIALLY OF 53-63 WEIGHT PERCENT SIO2, 8-15 WEIGHT PERCENT AL2O3, 20-32 WEIGHT PERCENT CAO AND 5.5-9.5 WEIGHT PERCENT CAF2.
Claim 3
Independent Claim
88 words
A METHOD OF SEALING AN ALUMINA CERAMIC PART TO A METAL PART HAVING A COEFFICIENT OF EXPANSION COMPATIBLE WITH THE COEFFICIENT OF EXPANSION OF SAID ALUMINA PART WHICH COMPRISES WETTING AT LEAST ONE OF SAID PARTS WITH A MOLTEN GALSS CONSISTING ESSENTIALLY OF 53-63 WEIGHT PERCENT SI3I, 8-15 WEIGHT PERCENT AL2O3, 20-32 WEIGHT PERCENT CA3, AND 5.5-9.5 WEIGHT PERCENT CAF2, AND BRINGING THE PARTS TOGETHER WITH THE GLASS THEREBETWEEN AND HEATING THE SEALING AREA UNTIL A SEAL IS FORMED WITH BOTH PARTS, AND THEREAFTER COOLING THE COMPOSITE ARTICLE.
Claim 4
Independent Claim
88 words
A METHOD OF SEALING AN ALUMINA CERAMIC PART TO A METAL PART HAVING A COEFFICIENT OF EXPANSION COMPATIBLE WITH THE COEFFICIENT OF EXPANSION OF SAID ALUMINA PART WHICH COMPRISES WETTING AT LEAST ONE OF SAID PARTS WITH A MOLTEN GALSS CONSISTING ESSENTIALLY OF 53-63 WEIGHT PERCENT SI3I, 8-15 WEIGHT PERCENT AL2O3, 20-32 WEIGHT PERCENT CA3, AND 5.5-9.5 WEIGHT PERCENT CAF2, AND BRINGING THE PARTS TOGETHER WITH THE GLASS THEREBETWEEN AND HEATING THE SEALING AREA UNTIL A SEAL IS FORMED WITH BOTH PARTS, AND THEREAFTER COOLING THE COMPOSITE ARTICLE.
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |