Patent ID: 7237558

Claim:
A cigarette comprising a tobacco rod and a filter element connected to the tobacco rod, said filter element having an end proximal to the tobacco rod and an end distal from the tobacco rod, wherein said filter element comprises: a first longitudinally extending section of filter material positioned at the end of the filter element proximal to the tobacco rod; a second longitudinally extending section of filter material positioned at the end of the filter element distal from the tobacco rod and spaced apart from said first section of filter material, the two sections of filter material defining a compartment therebetween, wherein said first section of filter material has a greater particulate removal efficiency than said second section of filter material, said first section of filter material comprising filaments having a weight per unit length of less than about 2.5 denier per filament and said second section of filter material comprising filaments having a weight per unit length of greater than about 3.0 denier per filament; an absorbent material in granular form contained within at least a portion of said compartment; and a plurality of ventilation holes adapted for introducing air into the filter element, said ventilation holes being located at a point along the length of said filter element between the end of the filter element proximal to the tobacco rod and the approximate midpoint of the adsorbent-containing portion of said compartment.