Fluorescent lamp with superimposed luminescent layers
US4088923A · kind A · utility
23Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 2, 1976 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | Aug 2, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7784
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Electric discharge lamp in which ultraviolet radiation is converted into light by means of two superposed luminescent layers. The two layers have about the same chromaticity point. The luminescent material in the layer more remote from the discharge is cheaper than that in the other layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.