Tob. Reporter, 1998, 125-5, p. 75, ISSN.0361-5693
Low gas phase filter for cigarettes
U.S. Patent 5,718,250 assigned to R.J. Reynolds Tobacco Co., Winston-Salem, North Carolina, USA. A cigarette having an improved carbon-bearing filter. A cigarette is provided with a smokable rod attached to a filter element having a region of carbon ...