UV absorbing fused quartz and its use for lamp envelopes
US5569979A · kind A · utility
16Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1994 |
| Grant date | Oct 29, 1996 |
| Priority date | — |
| Expiry date | Sep 26, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2203/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Fused quartz containing europium oxide, titanium dioxide and cerium oxide has been found to be effective for absorbing UV radiation while transmitting visible light radiation. Uses for this material include lamp envelopes and shrouds for halogen-incandescent lamps and metal halide arc discharge lamps which emit both UV and visible light radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.