FILTER FOR CIGARETTES

摘要

1,256,048. Tobacco-smoke filters. LONZA Ltd. and F. J. BURRUS & CIE. 19 Nov., 1970 [27 Nov., 1969], No. 55139/70. Heading A2C. A filter for cigarettes contains adsorptionactivated hollow carbon fibres, preferably in combination with other filter materials such as solid carbon fibres, corrugated pulp, cellulose acetate, active charcoal, silica gel, metal oxides and silicates.