Fluorescent lamp having ultraviolet reflecting layer
US6952081B1 · kind B1 · utility
5Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2003 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Feb 27, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fluorescent lamp with an ultraviolet reflecting barrier layer between the glass envelope and the phosphor layer(s). The barrier layer is a blend of gamma alumina, alpha alumina and theta alumina, such as 5–80 weight percent gamma alumina, 5–80 weight percent alpha alumina, and 5–80 weight percent theta alumina.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.