Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by

Official title: {Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts (layered catalysts with only one function B01D53/9413, B01D53/944 or B01D53/945)}

B01D53/9459 (Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by) appears on 1,259 US grants and 1,534 published applications in this corpus.