Barium-free electrode materials for electric lamps and methods of manufacture thereof
US7633216B2 · kind B2 · utility
2Cited by
15References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 28, 2005 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | Jan 16, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A barium-free electron emissive material comprises a barium-free metal oxide composition and operable to emit electrons on excitation. A lamp including an envelope, an electrode including a barium-free electron emissive material and a discharge material, is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.