ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,530,016, issued on Jan. 20, was assigned to nVariate Inc. (Austin, Texas).

"Watertight spline modeling for additive manufacturing" was invented by Benjamin Urick (Roseville, Calif.), Richard H. Crawford (Austin, Texas) and Daniel L. Keller (Waitsfield, Vt.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods and computer systems for utilizing gapless surface models in computer-aided design (CAD) applications to produce printing instructions for additive manufacturing (AM). A geometrically watertight CAD spline model of an object to be printed is received. For of a plurality of AM layers of the object, an intersection routine is performed of a plane of...