Patent ID: 8353302

Claim:
A smoking article comprising: a tobacco rod including a smokeable material including a phenol control agent, the phenol control agent being operative as a tar diluent and as a mechanism to reduce phenol levels in mainstream smoke; and a filter attached to the tobacco rod by tipping paper, the filter having an upstream end adjacent the tobacco rod, a filter plug of low filtration efficiency cellulose acetate at a downstream end thereof, a restrictor defining at least one flow passage therethrough upstream of the filter plug, an empty cavity extending between an upstream end of the filter plug and a downstream end of the restrictor, and a ventilation zone extending through the tipping paper and communicating with the cavity, the restrictor providing a resistance to draw of at least 70 mm water and the ventilation zone providing at least 60% dilution to the mainstream smoke, wherein the phenol control agent comprises glycerin present in the tobacco rod in an amount of at least 4% by weight of the smoking material in the tobacco rod.