Fluorescent lamp for use in aquaria
US5539276A · kind A · utility
5Cited by
4References
6Claims
0Family size
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Key dates
| Filing date | May 13, 1994 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | May 13, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/44
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A fluorescent lamp produces light having color coordinates within an ellipse (A) about 22 standard deviation of color matching around the color coordinates (b)x=0.344 y=0.302. The luminescent layer of the lamp includes a mixture of: magnesium fluorogermanate activated by manganese as red emitter; calcium halophosphate as white emitter; and a blue emitter preferably strontium pyrophosphate activated by divalent tin. The layer may alternatively be a mixture of red emitting magnesium fluorogermanate and blue emitting barium titanium pyrophosphate. Other blue emitters are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.