High pressure mercury vapor discharge lamp having improved electrodes
US4044276A · kind A · utility
7Cited by
8References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Apr 9, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/0737
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The emitter material on the electrode of a high intensity discharge lamp comprises hafnium oxide, barium oxide and calcium oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.