US3275359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass composition for hermetic seals
Assignee: General Electric Co
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Filing: 1963-03-14
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Granted: 1966-09-27
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Expires: 1983-03-14
Abstract
No abstract record available.
Inventors
- 👤 William A Graff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:19
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/08; H01G9/10; C; C03; C03C; C03C27/00; C03C3/00; C03C3/12; C03C3/14; C03C3/15; C04; C04B; C04B37/00; C04B37/003; C04B37/005; C04B37/02; C04B37/021; C04B37/04; C04B37/045; H01G13/00; H01G13/003; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/658; C04B2237/00; C04B2237/02; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/36; C04B2237/363; C04B2237/40; C04B2237/403; C04B2237/50; C04B2237/82; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A GLASS FOR SEALING TO TANTALUM AND TO OTHER METALS ALLOYS, AND CERAMICS HAVING THERMAL EXPANSION CHARACTERISTICS SUCH THAT THE MEANS COEFFIECIENTS OF THERMAL EXPANSION OVER THE TEMPERATURE RANGE OF 20*C. TO 500*C. DOES NO DIFFER FROM THAT OF TANTALUM OVER THE SAME TEMPERATURE RANGE BY MORE THAN ABOUT 10X10-7 CM./CM./ *C., WHICH HAS A COMPOSITION BY WEIGHT OF ABOUT 25% A12O3 ABOUT 35% BAO, FROM ABOUT 35% TO SLIGHTLY LESS THAN 40% BEO3 AND FROM A SMALL BUT EFFECTIVE AMOUNT TO ABOUT 5% CEO2.
Claim 2
Dependent Claim
85 words
A GLASS FOR SEALING TO TANTALUM AND TO OTHER METALS ALLOYS, AND CERAMICS HAVING THERMAL EXPANSION CHARACTERISTICS SUCH THAT THE MEANS COEFFIECIENTS OF THERMAL EXPANSION OVER THE TEMPERATURE RANGE OF 20*C. TO 500*C. DOES NO DIFFER FROM THAT OF TANTALUM OVER THE SAME TEMPERATURE RANGE BY MORE THAN ABOUT 10X10-7 CM./CM./ *C., WHICH HAS A COMPOSITION BY WEIGHT OF ABOUT 25% A12O3 ABOUT 35% BAO, FROM ABOUT 35% TO SLIGHTLY LESS THAN 40% BEO3 AND FROM A SMALL BUT EFFECTIVE AMOUNT TO ABOUT 5% CEO2.
Claim 3
Dependent Claim
55 words
A HERMETIC SEAL BODY COMPRISING TWO SINTERED ALUMINA CERAMIC TUBES FUSION SEALED TOGETHER BY GLASS, SAID GLASS BEING COMPOSED OF ABOUT 35% BEO3, ABOUT 25% A1O3, ABOUT 35% BAO AND ABOUT 5% CEO2 BY WEIGHT AND HAVING A MEANS COEFFICIENT OF THERMAL EXPANSION OF ABOUT 61.7X10-7 CM./CM./*C. IN THE TEMPERATURE RANGE OF 0*C. TO 300*C.
Claim 4
Dependent Claim
55 words
A HERMETIC SEAL BODY COMPRISING TWO SINTERED ALUMINA CERAMIC TUBES FUSION SEALED TOGETHER BY GLASS, SAID GLASS BEING COMPOSED OF ABOUT 35% BEO3, ABOUT 25% A1O3, ABOUT 35% BAO AND ABOUT 5% CEO2 BY WEIGHT AND HAVING A MEANS COEFFICIENT OF THERMAL EXPANSION OF ABOUT 61.7X10-7 CM./CM./*C. IN THE TEMPERATURE RANGE OF 0*C. TO 300*C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |