Terbium-activated rare earth oxysulfide phosphors with controlled decay
US4113648A · kind A · utility
6Cited by
5References
3Claims
0Family size
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Key dates
| Filing date | Nov 20, 1974 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Nov 20, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7767
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Europium and ytterbium when added to terbium-activated rare earth phosphors having either a lanthanum oxysulfide, gadolinium oxysulfide, or yttrium oxysulfide host increase the decay period of the phosphors in a controlled manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.