Lumen maintenance in fluorescent lamps
US10236174B1 · kind B1 · utility
4Cited by
117References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2017 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Dec 28, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B41/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fluorescent lamp, including a vitreous portion of the fluorescent lamp comprising a vitreous envelope filled with a working gas mixture, the vitreous envelope having an inner surface facing the working gas mixture side of the vitreous portion; a first coating deposited on the inner surface, the first coating comprising a first metal oxide; a second coating deposited on top of the first coating, the second coating comprising a phosphor; and a third coating deposited on top of the second coating, the third coating comprising a second metal oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.