Chemical cartridge for protective respiratory mask

Abstract From the Canadian patent

A chemical cartridge for protective, respiratory mask comprises separate active filter section and universal filter section. The active filter is formed of an absorbent medium impregnated with a reagent capable to capture and derive a target toxic pollutant having a chemically active function into an inert, non volatile and non toxic matter as air is inhaled. The active filter section is permeable to other types of pollutants. The universal filter section includes activated carbon or any other equivalent filtering material and is positioned downstream the active filter section. In operation the target pollutant is captured and derived into inert, non volatile and non-toxic matter by the …