Abstract: A composition for removal of NO from smoke, effective after storage in the presence of moisture and the volatile components of tobacco, comprising, by weight of the total composition, from about 5% to about 40% of a permanganate selected from the group consisting of NaMnO.sub.4, Ca(MnO.sub.4).sub.2 and mixtures thereof, from about 0.5% to about 6% colloidal silica, from about 40% to about 90% silica gel and from about 4% to about 30% H.sub.2 O, with the silica gel having a granule size of from about 20 to about 100 mesh and an initial pore volume of from about 0.6 cc/g to about 1.4 cc/g. Alumina gel may be used in place of part of the silica gel in order to reduce the temperature of the smoke.

Abstract: A method and apparatus are disclosed for applying foamed material to tobacco, particularly in connection with the making of cigarettes. The foamed material may be added to the tobacco, for example, in the paper guide section of a cigarette maker at the garniture mouth (21) or through the short tongue (30) or through both, or at the chimney (10). Addition of a foamed material to the tobacco, during the cigarette making process, results in a cigarette in which the material added is more uniformly distributed.

Abstract: Non-combustible carbonized cigarette filters are manufactured wherein porous cellulosic material is contacted with a film-forming aqueous solution of an inorganic salt selected from the group consisting of alkali metal and ammonium silicates, carbonates, hydrophosphites, diphosphites, phosphites, hypophosphates, orthophosphates, diphosphates, triphosphates, polymetaphosphates, peroxymonophosphates, peroxydiphosphates, orthoborates, metaborates, tetraborates and mixtures thereof so that the cellulosic material contains at least about 1%, preferably from about 2% to about 6%, of the salt on a dry weight basis and then pyrolyzing the treated cellulosic material in an inert atmosphere at a temperature of at least about 700.degree. C. to about 900.degree. C., under conditions such that at least about 15%, preferably from about 20% to about 40% of the initial weight of the cellulosic material remains after pyrolysis.