Abstract: A portable, attachable and removable wiper assembly for a windshield having a motor housing containing a motor and a wiper blade joined to the motor by a linkage arm with an upper support clamp joined proximally to the top of the motor housing which is suitable for clamping to the vertical side of the windshield and a horizontal support bracket joined proximally to the bottom of the motor housing, extending horizontally along the bottom of the windshield, wherein the wiper blade is mounted on the horizontal support bracket and extends vertically therefrom to oscillate. The wiper assembly does not require any modification of the windshield to be used.

Abstract: Electrostatic spray apparatus including an electrode for generating a high-voltage corona, one or more sprayers for generating a spray of liquid droplets and for directing the droplets into the high-voltage corona whereby an electrical charge is imparted to the droplets. The conduit which supplies the liquid to the sprayers is electrically grounded so that liquid supplied to the sprayer device is at ground potential. The electrode is continuously maintained substantially clean and dry as it generates the high-voltage corona. A process for removing particulates from a gas stream is also disclosed.