Coumarin derivatives and an electroluminescent (EL) device using the coumarin derivatives
US6727362B1 · kind B1 · utility
5Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2003 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Jun 19, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Coumarin derivatives are used with an electroluminescent (EL) device in accordance with the present invention. The coumarin derivatives have the representative formula (1): wherein the R1 is a branched alkyl group of 3 to 10 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.