US4131478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing glass compositions and method
Assignee: Motorola Solutions Inc
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Filing: 1977-08-26
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Granted: 1978-12-26
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Expires: 1997-08-26
Abstract
Abstract A solder glass/ceramic composition and method for sealing television picture tube components wherein the composition remains vitreous throughout the sealing process. The composition comprises a mixture of 9-15 weight percent aluminum oxide and 91-85 weight percent solder glass. The solder glass components comprise, in weight percent of the glass alone, SiO 2 about 2-4 percent, PbO about 64-66 percent, PbF 2 about 5-10 percent, ZnO about 6-9 percent, CdO about 4-6 percent, and B 2 O 3 about 12-14 percent.
Inventors
- 👤 Earl K. Davis
- 👤 Kent W. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:05
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/24; C03C8/245
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
64 words
A non-devitrifying sealing glass composition consisting essentially of about 85-91 weight percent of solder glass and about 15-9 weight percent of Al 2 O 3 wherein the solder glass consists essentially of by weight: SiO 2 about 3 percent, PbO about 66 percent, PbF 2 about 5 percent, ZnO about 9 percent, CdO about 5 percent and B 2 O 3 about 12 percent.
Claim 2
Dependent Claim
64 words
A non-devitrifying sealing glass composition consisting essentially of about 85-91 weight percent of solder glass and about 15-9 weight percent of Al 2 O 3 wherein the solder glass consists essentially of by weight: SiO 2 about 3 percent, PbO about 66 percent, PbF 2 about 5 percent, ZnO about 9 percent, CdO about 5 percent and B 2 O 3 about 12 percent.
Claim 3
Dependent Claim
36 words
The non-devitrifying sealing glass composition of claim 1 wherein the percentage amounts of solder glass and Al 2 O 3 are about 87 weight percent solder glass and 13 weight percent Al 2 O 3 .
References Cited (Backward Citations)
CA827197A
Cited
US2643020A
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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) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |