Preparation to absorb volatile compounds to extend the shelf life of food, sold as an integral component of a gas permeable filter for use in refrigeration and air circulation equipment; and absorption system for volatile compounds, comprised primarily of a gas permeable filter for use in refrigeration and air circulation equipment

'absorb':3 'absorpt':32 'air':28,49 'circul':29,50 'compon':17 'compound':5,36 'compris':37 'equip':30,51 'extend':7 'filter':22,43 'food':12 'gas':20,41 'integr':16 'life':10 'permeabl':21,42 'prepar':1 'primarili':38 'refriger':26,47 'shelf':9 'sold':13 'system':33 'use':24,45 'volatil':4,35

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