Patents Assigned to The Great American Filter Company
  • Air filter
    Patent number: 5037455
    Abstract: An air filter assembly includes three layers of alternating layers of woven polypropylene and polyurethane sandwiched together in a removable plastic frame. The polypropylene layers are woven in a honeycomb pattern. Each successive layer acquires an opposite electrostatic charge. The air filter assembly mechanically and electrostatically filters dust from air.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: August 6, 1991
    Assignee: The Great American Filter Company
    Inventors: Irwin B. Scheineson, Jerry A. Govert