US4256495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing glass
Assignee: Hitachi Ltd
•
Filing: 1979-08-03
•
Granted: 1981-03-17
•
Expires: 1999-08-03
Abstract
Abstract A non-conductive sealing glass consists of 100 parts by weight of a composition containing 20-30 mole % of B2O3, 60-69 mole % of PbO, 0-10 mole % of ZnO, O-6 mole % of CuO and 0.5-2.0 mole % of Bi2O3; and 1-5 parts by weight of either one or both of SiO2 and Al2O3. The sealing glass is suitable for bonding together and sealing soda-lime-silica glass plates utilized to manufacture panel display devices.
Inventors
- 👤 Hiromitsu Kawamura
- 👤 Akira Misumi
- 👤 Kozo Odawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:46
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/24; C03C8/245; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/072; C03C3/074; C03C3/0745; C03C3/12; C03C3/14; C03C3/142
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
Non-conductive sealing glass of not greater than about 10μ average grain diameter consisting of 100 parts by weight of a composition consisting of 20-30 mole % of B 2 O 3 , 60-69 mole % of PbO, 0-10 mole % of ZnO, 0-6 mole % of CuO and 0.5-2.0 mole % of Bi 2 O 3 ; and 1-5 parts by weight of either one of SiO 2 and Al 2 O 3 .
Claim 2
Dependent Claim
74 words
Non-conductive sealing glass of not greater than about 10μ average grain diameter consisting of 100 parts by weight of a composition consisting of 20-30 mole % of B 2 O 3 , 60-69 mole % of PbO, 0-10 mole % of ZnO, 0-6 mole % of CuO and 0.5-2.0 mole % of Bi 2 O 3 ; and 1-5 parts by weight of either one of SiO 2 and Al 2 O 3 .
Claim 3
Dependent Claim
74 words
Non-conductive sealing glass of not greater than about 10μ average grain diameter consisting of 100 parts of weight of a composition consisting of 20-30 mole % of B 2 O 3 , 60-69 mole % of PbO, 0-10 mole % of ZnO, 0-6 mole % of CuO and 0.5-2.0 mole % of Bi 2 O 3 ; and 1-5 parts by weight of the sum of SiO 2 and Al 2 O 3 .
Claim 4
Dependent Claim
74 words
Non-conductive sealing glass of not greater than about 10μ average grain diameter consisting of 100 parts of weight of a composition consisting of 20-30 mole % of B 2 O 3 , 60-69 mole % of PbO, 0-10 mole % of ZnO, 0-6 mole % of CuO and 0.5-2.0 mole % of Bi 2 O 3 ; and 1-5 parts by weight of the sum of SiO 2 and Al 2 O 3 .
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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |