Dopant-free tungsten electrodes in metal halide lamps
US7583030B2 · kind B2 · utility
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13References
20Claims
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Key dates
| Filing date | Jul 21, 2004 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Jul 21, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A metal halide lamp having a high pressure quartz arc tube in which the electrodes are non-thoriated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.