ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,277, issued on April 7, was assigned to BEIJING SUMMER SPROUT TECHNOLOGY Co. LTD. (Beijing).

"Light-emitting material with a polycyclic ligand" was invented by Zhihong Dai (Beijing), Cuifang Zhang (Beijing), Qi Zhang (Beijing), Nannan Lu (Beijing), Chi Yuen Raymond Kwong (Beijing) and Chuanjun Xia (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a luminescent material having a polycyclic ligand. The luminescent material is a new metal complex having a polycyclic ligand may be used as luminescent materials in electroluminescent devices. These new metal complexes achieve red light emission, have a very narrow full width at half maxi...