A chemical filter medium for removing ozone and nitrogen oxide includes a first ozone absorption layer for mainly removing ozone having a filtering base material for removing ozone, a first nitrogen oxide absorption layer for mainly removing nitrogen oxide formed on the first ozone absorption layer that...http://www.google.fr/patents/US7163573?utm_source=gb-gplus-shareBrevet US7163573 - Chemical filter medium, chemical filter including the chemical filter medium and method for manufacturing the chemical filter
Chemical filter medium, chemical filter including the chemical filter medium ...