Electrically Heated Windows and Electrochromic Windows for Transportation Vehicles

Sheets of glass can now be inexpensively coated with highly conductive films (5 ohms/square) of tin oxide, using non-vacuum pyrolytic techniques. Such glass can be used in the production of electrically heated windows, suitable for defogging and defrosting, in transportation vehicles. This process can also be used for depositing electrochrormic materials such as tungsten oxide on the highly conductive tin oxide, for windows or sunroofs, which change colour and transparency with a small (up to 2 V) applied voltage.