Synthetic willemite phosphors and fluorescent lamp containing the same
US4396863A · kind A · utility
17Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1981 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Aug 18, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Synthetic willemite phosphor for use in fluorescent lamps in the form of particles coated with from 0.001% to 0.5% of an oxide of scandium, yttrium, lanthanum or a rare earth element. Fluorescent lamps comprising the phosphor which have improved aging qualities are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.