ALEXANDRIA, Va., June 2 -- United States Patent no. 12,643,862, issued on June 2, was assigned to BASF SE (Ludwigshafen am Rhein, Germany).
"Rylene dicarboximides" was invented by Frank Wuerthner (Hochberg, Germany), Magnus Mahl (Wuerzburg, Germany) and Helmut Reichelt (Ludwigshafen am Rhein, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to compounds of the formula (I), a process for its preparation and its use as fluorescent dye that absorbs light emitted from an irradiation source and emits light different from that of the irradiation source and having a wavelength in the range from 680 to 950 nm; in photovoltaic applications; or as semiconductor in organic electronic...