ALEXANDRIA, Va., April 2 -- United States Patent no. 12,263,529, issued on April 1, was assigned to Pine Castle Investments Ltd. (Tortola, British Virgin Islands).

"Conductive nanostructure purification" was invented by Samuel Lumahan Robillos (Milpitas, Calif.), Ian Storms Moody (Soquel, Calif.) and Haixia Lumahan Dai (Pleasanton, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of purifying a metal nanostructure composition containing desired nanostructures and undesired nanostructures. The method includes providing a solution within which metal nanostructures have been synthesized including desired and undesired nanostructures. The solution includes polyol and has a viscosity. The method inc...