ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,565, issued on Oct. 21, was assigned to Avantama AG (Stafa, Switzerland).

"Solid polymer composition, a self-supporting film and a light emitting device" was invented by Norman Albert Luchinger (Meilen, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention refers in a first aspect to self-supporting film comprising green luminescent crystals (1), red luminescent crystals (2), and a polymer (3). The green luminescent crystals (1) are perovskite crystals. The red luminescent crystals (2) are zincblende or wurzite, preferably zincblende, crystals. A second aspect of the invention refers to a solid polymer composition (100). A third a...