The European Patent Office (EPO) ruled to upheld one of Universal Display's key PHOLED patents (EPO#EP1394870). This patent, which UDC refers to as EP870, details an OLED in which the emissive layer contains phosphorescent dopant compounds. This patent corresponds to the company's US'238 patent.

In November 2013, the Japanese High Court decided to validate UDC's claims in Japanese patent #4511024, which is a counterpart patent to the EP870 and US238 patents. Later in November, The EPO revoked one of UDC's basic phosphorescent OLED patents, EPO#1449238. The opposing parties included Sumitomo Chemical, Merck and BASF.

Source: EPO

Disclosure: the author of this post holds shares in universal display



Link to EPO notice

Can you post a link to the EPO notice? I checked for a decision this week, but could not find any.

I posted a link in the

I posted a link in the original post (the source link). Here it is again anyway.

Atomic Force Microscopy for next-gen OLED processesAtomic Force Microscopy for next-gen OLED processes