Patents Assigned to Air Purification Products International, Inc.
  • Dual-dipole electrostatic air filter
    Patent number: 4902306
    Abstract: A filter assembly (10) for removing particulate matter from air forced therethrough comprises two pairs of oppositely charged woven electrostatic filtering material. Each pair of electrostatic filtering material comprises a positively charged and a negatively charged layer (22, 24, 28 and 30). An open cell foam layer (26) is disposed between the two pairs. Metal grids (20,32) enclose the filtering elements.
    Type: Grant
    Filed: August 9, 1988
    Date of Patent: February 20, 1990
    Assignee: Air Purification Products International, Inc.
    Inventors: Gilbert W. Burnett, Paul D. Jackson