Sealing material
US7214429B2 · kind B2 · utility
20Cited by
20References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2003 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Jul 21, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2996
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sealing material for sealing an envelope of an electron tube. The sealing material comprises 0.01˜2.0 wt % of fine particle selected from the group consisting of SiO2, Al2O3 and ZrO2 having a particle diameter of 0.001˜0.1 μm, P2O5—SnO type low melting glass and thermal expansion-controlling low melting ceramics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.