Patent ID: 11925105
Assignee: UNIVERSAL DISPLAY CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 6:
7. The compound of claim 1, wherein
ring A, ring C, and ring E are 6-membered rings, and ring B and ring D are 5-membered rings;
ring A, ring C, and ring E are 5-membered rings, and ring B and ring D are 6-membered rings;
ring A and ring E are 5-membered rings, and ring B, ring C, and ring D are 6-membered rings;
ring A and ring E are 6-membered rings, and ring B, ring C, and ring D are 5-membered rings; or
ring A, ring B, ring D, and ring E are 5-membered rings, and ring C is a 6-membered ring.