Patent ID: 8021466

Claim:
A filter, comprising: a fiber filter body comprising a base and a plurality of projections extending from said base, and wherein said fiber filter body is a monolithic, non-woven fiber material body that is comprised of a fiber blend having a convoluted surface with projections that are in the form of zig-zag shaped rows which are separated by zig-zag shaped recesses, and wherein an interface region between each projection and supporting base is formed of a continuous blend of the fibers of said fiber blend, the improvement which comprises, said fiber filter body has said projections extending for 50% or more of a total thickness of said fiber filter body, and wherein said non-woven fiber filter body has a basis weight of between 500 g/sqm to 1000 g/sqm with a thickness of 1.5 inches to 3.0 inches.