DURASTEEL
Building and construction materials, namely, composite sheets and panels comprising primarily of 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, barriers, fire and/or blast-resistant barriers, ducts and panels comprised primarily of reinforced cement and steel
Registered · August 9, 2010 · 85103195 ·