ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,591, issued on Jan. 13, was assigned to Merck Patent GmbH (Darmstadt, Germany).
"Materials for organic electroluminescent devices" was invented by Amir Parham (Frankfurt am Main, Germany), Jonas Kroeber (Frankfurt am Main, Germany), Jens Engelhart (Darmstadt, Germany), Christian Ehrenreich (Darmstadt, Germany) and Christian Eickhoff (Mannheim, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention describes dibenzofuran derivatives substituted by electron-deficient heteroaryl groups, and electronic devices, especially organic electroluminescent devices, comprising these compounds as triplet matrix materials."
The patent was fi...