ALEXANDRIA, Va., June 10 -- United States Patent no. 12,290,579, issued on May 6, was assigned to ECKART AMERICA Corp. (Painesville, Ohio).

"Effect pigments having a reflective core and semiconductor layers" was invented by Devin Schmitt (Munster, Ind.) and Jonglak Choi (Munster, Ind.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is an effect pigment having a layer stack which comprises a highly reflective metallic flake having a first major interface and opposed to this first interface a second major interface, and at least one side surface and directly adjacent on one or of both of these major interfaces a layer of a semiconducting material having an average atomic composition of: a) Si(1...