ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,478,151, issued on Nov. 25, was assigned to Preciosa a.s. (Jablonec nad Nisou, Czech Republic).
"Multi-layer of decorative faceted fashion jewellery stones for technical use" was invented by Pavel Stok (Liberec, Czech Republic), Pavel Zadrazil (Turnov, Czech Republic), Petr Franc (Simonovice, Czech Republic), Martin Novotny (Liberec, Czech Republic) and Stanislava Stara (Liberec, Czech Republic).
According to the abstract* released by the U.S. Patent & Trademark Office: "A final layer of a multi-layer of thin deposit and lacquer layers of a decorative faceted functional stone formed by 10 to 35% of nano/colloidal silica, optionally nano/colloidal alumina, 30 to 50% of encapsulated al...