filtered cigarettes invented Kent cigarettes, introduced in 1952 by the P. Lorillard Company, utilized a “Micronite” filter made primarily of crocidolite (blue asbestos), one of the most dangerous forms of the mineral. This marketing as History of an Invention: Kent
History of an Invention: Kent Micronite CigsSpot Medium When cigarette filters were made of asbestos The Cancer Letter High Tech Filters Cigarette Filter Encyclopedia MDPI Filter as Fraud The Center for the Study of Tobacco and Society
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