Patents Examined by J. Smetans
  • Method for cleaning ductwork
    Patent number: 6468360
    Abstract: This invention includes systems and methods for cleaning ventilation ducts using a dry ice blasting system that is adapted to blast debris from the interior surfaces of ventilation ducts. This invention employs either existing or artificial duct ventilation airflow to evacuate dislodged debris and a filter or filtration system attached to the ventilation system to capture the dislodged debris.
    Type: Grant
    Filed: July 28, 2000
    Date of Patent: October 22, 2002
    Inventor: Benjamin Edward Andrews