US Patent 7677254 - Cigarettes including iron oxynitride nanoparticles

http://www.freepatentsonline.com/7677254.html

This patent from Philip Morris teaches iron oxynitride nanoparticles used to reduce carbon monoxide and nitric oxide in cigarette smoke. Claim 1 reads:

1. A component of a smoking article comprising

nitrided transition metal oxide nanoscale particles and/or nitrided transition metal oxide clusters,

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

wherein the nanoscale particles and/or clusters comprise iron oxynitride.