US4704370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing glass composition
Assignee: Iwaki Glass Co Ltd
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Filing: 1983-11-03
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Granted: 1987-11-03
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Expires: 2003-11-03
Abstract
Abstract A sealing glass composition comprising from 75 to 50% by volume of low-melting glass powder containing PbO as the main component, from 20 to 45% by volume of ceramics powder having a thermal expansion coefficient of at most 30x10-7 DEG C.-1 in a range of from room temperature to 300 DEG C. and from 5 to 30% by volume of TiO2-SnO2 solid solution powder.
Inventors
- 👤 Hiroshi Seki
- 👤 Toshiki Nishiyuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:42
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/60; C; C03; C03C; C03C14/00; C03C14/004; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/072; C03C3/074; C03C3/0745; C03C8/00; C03C8/24; C03C2214/00; C03C2214/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
A sealing glass composition consisting of from 75 to 50% by volume of low-melting glass powder containing PbO as the main component; from 20 to 45% by volume of ceramics powder having a thermal expansion coefficient of at most 30×10 -7 ° C. -1 in a range of from room temperature to 300° C. and from 5 to 30% by volume of TiO 2 --SnO 2 solid solution powder; wherein said solid solution powder comprises from 5 to 50 molar % of TiO 2 and from 50 to 95 molar % of SnO 2 .
Claim 2
Dependent Claim
95 words
A sealing glass composition consisting of from 75 to 50% by volume of low-melting glass powder containing PbO as the main component; from 20 to 45% by volume of ceramics powder having a thermal expansion coefficient of at most 30×10 -7 ° C. -1 in a range of from room temperature to 300° C. and from 5 to 30% by volume of TiO 2 --SnO 2 solid solution powder; wherein said solid solution powder comprises from 5 to 50 molar % of TiO 2 and from 50 to 95 molar % of SnO 2 .
Claim 3
Dependent Claim
16 words
The sealing glass composition acording to claim 1, wherein said ceramics powder is made of cordierite.
Claim 4
Dependent Claim
47 words
The sealing glass composition according to claim 2, which comprises from 70 to 53% by volume of the low-melting glass powder, from 25 to 35% by volume of the cordierite powder and from 5 to 20% by volume of the TiO 2 --SnO 2 solid solution powder.
Claim 5
Dependent Claim
24 words
The sealing glass composition according to claim 1, wherein the low-melting glass powder has a glass transition point of not higher than 335° C.
Claim 6
Dependent Claim
56 words
The sealing glass composition according to claim 1, wherein the low-melting glass powder is composed essentially of from 77 to 86% by weight of PbO, from 6.0 to 15% by weight of B 2 O 3 , from 0.5 to 6.9% by weight of ZnO and from 0.1 to 3.0% by weight of SiO 2 .
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) | 1990-11-02 | 1991-05-04 | 1991-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-02 | 1995-05-04 | 1995-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-02 | 1999-05-04 | 1999-11-03 | $7700.00 | Window Closed / Lapsed |