US Patent Issued to Lexington Manufacturing on Oct. 14 for "Laminated door core for use in fire rated doors and associated methods" (Canadian, American Inventors)

ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,245, issued on Oct. 14, was assigned to Lexington Manufacturing LLC (Brainerd, Minn.).

"Laminated door core for use in fire rated doors and associated methods" was invented by Lance Wasniewski (Ironton, Minn.) and Andre Fortin (Hatley Township, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A laminated door core for use in fire rated doors includes a center layer having a first side and an opposing second side, where the center layer comprises fire rated particleboard. The laminated door core also includes a first layer comprising calcium silicate adhered to the first side of the center layer, a second layer comprising calcium silicate adhere...