Tob. Reporter, 2003, 130-12, p. 61, ISSN.0361-5693
Cigarette filter with reagent
U.S. Patent 6,595,218 assigned to Philip Morris Inc., New York, New York, USA. A cigarette filter having a reagent that chemically reacts with and removes a gaseous component of a smoke stream. The reagent contains functional groups covalently bonded...