Tob. Reporter, 2000, 127-8, p.79, ISSN.0361-5693
Biodegradable filter material
U.S. Patent 6,062,228, assigned to Biotech Biologische Naturverpackungen GmbH, Emmerich, Germany. There is provided a biodegradable filter tow or filter material from renewable raw materials for use as a tobacco smoke filter element of cigarettes,...