Organic light-emitting diode
US6838193B2 · kind B2 · utility
3Cited by
1References
56Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2002 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Nov 14, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention features a dipyrazolo-pyridine compound of formula (I): each of R1, R2, R3, and R4, independently, is H, alkyl, alkenyl, cycloalkyl, aryl, or heteroaryl; and each of R5 and R6, independently, is aryl or heteroaryl, or R5 and R6, together with the N atom they are attached to, are heteroaryl. The dipyrazolo-pyridine compound can be used in an electro-luminescence device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.