Catalytic agents; Ceramic particles for use as a filtering media in air purification, namely, ceramic-based nano composite filtration materials for use in air purification; chemical preparations in the nature of filtering materials for use in air purification; ceramic particles for use as a filtering media in air purification

'agent':2 'air':12,25,38,49 'base':17 'catalyt':1 'ceram':3,16,40 'ceramic-bas':15 'chemic':27 'composit':19 'filter':9,33,46 'filtrat':20 'materi':21,34 'media':10,47 'name':14 'nano':18 'natur':31 'particl':4,41 'prepar':28 'purif':13,26,39,50 'use':6,23,36,43

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