US Patent 8051859 - Sputter deposition of nanoparticles on cigarette paper

http://www.freepatentsonline.com/8051859.html

This is the latest patent from Philip Morris covering a way to deposit nanoparticles during the fabrication of cigarette products in order to assist in the filtration of harmful gases such as carbon monoxide in cigarette smoke. Claim 1 reads:

1. A method for physical vapor deposition of nanoscale particles directly on a substrate comprising:

supporting the substrate in a chamber having a target;

forming nanoscale particles from the target; and

depositing the nanoscale particles directly on the substrate

wherein the substrate is selected from the group consisting of tobacco cut filler, cigarette paper and cigarette filter material.