Reprographic metal halide lamps having long life and maintenance
US5013968A · kind A · utility
12Cited by
9References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1989 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Mar 10, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/125
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Metal halide vapor arc lamps for reprographic and projection processes emitting in the blue, green and red bands with excellent primary color separation and having long life and lumen maintenance contain mercury, zinc, indium, lithium, thallium, a halogen and a rare earth metal such as lanthanum, scandium or dysporsium in the arc tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.