Patent ID: 7244170

Claim:
An abrasive article comprising: a porous abrasive layer having an abrasive surface, said porous abrasive layer comprising a substrate having a first surface, a second surface opposite said first surface, a plurality of abrasive particles affixed to said first surface with at least one binder, and a plurality of openings extending from said abrasive surface to said second surface of said porous abrasive layer; a first filter media having a first surface and a second surface opposite said first surface, said first surface of said first filter media proximate said second surface of said porous abrasive layer, said first filter media comprising a plurality of discrete channels formed by a plurality of channel sidewalls, said channels extending from said first surface of said first filter media to said second surface of said first filter media, said first filter media having a height in the range of 1 to 20 millimeters; a second filter media having a first surface and a second surface opposite said first surface, said first surface of said second filter media proximate said second surface of said first filter media; and an attachment interface layer proximate said second surface of said second filter media; wherein said openings cooperate with said channels to allow the flow of particles from said abrasive surface to said second filter media.