ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,792, issued on May 20, was assigned to Titeflex Corp. (Springfield, Mass.).

"Multilayer composite pipe and pipe assemblies including reflective insulation" was invented by Donald Bradley Campbell (Gallatin, Tenn.) and Jordan Strunk (Portland, Tenn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "One aspect of the invention provides a composite tube including: an inner plastic tube; an aluminum layer circumferentially surrounding the inner plastic tube; and an outer plastic layer circumferentially surrounding the aluminum layer. The aluminum layer is an alloy selected from the group consisting of: AL 3004, AL 3005, AL 3105, AL 5052, AL 6061, and AL 80...