ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,598, issued on Sept. 30, was assigned to FUDAN UNIVERSITY (Shanghai).
"Long-afterglow luminescent material" was invented by Fuyou Li (Shanghai) and Ming Xu (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a long-afterglow luminescent material, comprising A) at least one light-absorbing agent, B) at least one luminescent agent, and C) at least one photochemical cache agent. The light-absorbing agent and the luminescent agent are compounds having different structures, and the cache agent is selected from one or more compounds of formula (I), (II) and/or (III).The material has luminescent intensity reaching the level of commercial...