ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,022, issued on June 30, was assigned to Peridot Print LLC (Palo Alto, Calif.).

"Three-dimensional printing" was invented by Emre Hiro Discekici (San Diego), Graciela E Negri Jimenez (San Diego), Shannon Reuben Woodruff (San Diego), Alay Yemane (San Diego) and Mark H. Kowalski (Corvallis, Ore.).

According to the abstract* released by the U.S. Patent & Trademark Office: "In an example of a surface treatment method, a three-dimensionally printed polyamide object is used. In the surface treatment method, the three-dimensionally printed polyamide object is first exposed to benzyl alcohol. In the surface treatment method, the three-dimensionally printed polyamide object is exposed to m...