Patent ID: 8361103

Claim:
An intravascular filter device for placement within a blood vessel, comprising: a plurality of elongated filter legs each having a proximal section, a distal section, and a length, the distal section of each elongated filter leg including a hook region configured to engage the wall of the blood vessel; wherein the plurality of elongated filter legs include a first pair of filter legs having a first length, a second pair of filter legs having a second length greater than the first length, and a third pair of filter legs having a third length that is greater than the second length; and wherein the first pair of filter legs has a cross-sectional diameter along the majority of its length, the second pair of filter legs has a cross-sectional diameter along a majority of its length and the third pair of filter legs has a cross-sectional diameter along a majority of its length, wherein the cross-sectional diameter of the third pair of filter legs is greater than the cross-sectional diameter of the first pair of filter legs and the second pair of filter legs.