ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,474, issued on May 27, was assigned to NINGBO INLIGHT TECHNOLOGY Co. LTD. (Ningbo, China).
"Method of manufacturing pigment" was invented by Daoyuan Ma (Ningbo, China) and Lingjie Jay Guo (Ann Arbor, Mich.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of manufacturing a pigment. The method includes: providing a substrate; forming stacked multiple sets of films successively on the substrate, wherein each set of films comprises a sacrificial layer and an optical film, the sacrificial layer and the optical film are successively stacked, and the sacrificial layer is a stripping agent with compressive stress or low stress; and obtaining the pig...