ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,081, issued on March 25, was assigned to VELAN INC. (Montreal).

"Thermal insulating sleeve liner for fluid flow device and fluid flow device incorporating such liner" was invented by Luc David Vernhes (Hampstead, Canada), Fadila Khelfaoui (Montreal), Alfredo Vincenzo Costantini (Laval, Canada) and Duc Thanh Tran (Montreal).

According to the abstract* released by the U.S. Patent & Trademark Office: "A thermal insulating sleeve liner for fluid flow devices such as valves and piping used in severe industrial applications is preferably additively manufactured (e.g., by 3D printing) to fit into the bore of a protected fluid flow device. Internal interstices and/or external ribs provi...