Cigarette and filter for tobacco smoke
AssigneeMontclair Research Corporation
InventorHarold Grossman
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Abstract
A filter for tobacco smoke comprises a porous substrate which has a deposit thereon of particles which are crystalline, positively charged at the pH of tobacco smoke, water-insoluble, hydrophobic, and oleophilic to provide a coalescing agent which acts to attract and neutralize the negatively charged particles which are dispersed in tobacco smoke. To increase the effectiveness of the filter, the tobacco has mixed therewith and deposited thereon particles of a water-insoluble, hydrophobic, moisture-laden, negative charge-imparting substance. Cigarettes made with tobacco thus treated furnish a number of advantages without being associated with the filter of the invention.
Claims14
A filter for tobacco smoke comprising a porous substrate having a deposit thereon of particles which are crystalline, water-insoluble, hydrophobic, and oleophilic, and which have a sufficient positive charge at the approximately 3 to 6 pH range of tobacco smoke to attract and coalesce negatively charged particles dispersed in the tobacco smoke.
Dependencies are inferred from the claim text.