US Patent 8398234 Electro-thermal antifog optical devices

Devices including a coating layer formed of a transparent, conductive coating composition described. The coating layer may function as an active antifog coating for the prevention of water vapor condensation as droplets on a surface. The coating includes a conductive polymer and functionalized carbon nanostructures and may be crosslinked with a transition metal crosslinking agent. The composition may be coated on a surface used in a visualization application such as a face shield, glasses, safety glasses, goggles, oculars, etc., to prevent fogging on the surface.