A filter device for temporary placement of a filter in an artery or vein is disclosed. The device includes an expandable filter mounted on a distal end of a catheter. The filter comprises a plurality of circumferentially adjacent porous segments which are arranged generally about the surface of a cone...http://www.google.com/patents/US6171328?utm_source=gb-gplus-sharePatent US6171328 - Intravascular catheter filter with interlocking petal design and methods of use
