DURASTEEL
Insulation materials, products and systems, namely, composite sheets and panels comprising a reinforced cement core mechanically bonded to steel sheets on both outer surfaces for use in barriers, doors, ducts and ceilings; fire and/or blast-resistant doors, fire and/or blast-resistant barriers, ducts and panels comprised of reinforced cement and steel
Registered · August 9, 2010 · 85103195 ·