Tuesday, August 16, 2011

US Patent 7997281 - Reduction of carbon monoxide and nitric oxide in cigarettes using nanoparticles


This patent from Philip Morris USA teaches how metal oxide nanoparticles can help convert carbon monoxide to carbon dioxide in cigarettes and other smoking products. Claim 1 reads:

1. A cigarette comprising a tobacco rod, cigarette paper and an optional filter, wherein at least one of the tobacco rod, cigarette paper and optional filter comprise nitrided transition metal oxide nanoscale particles and/or nitrided transition metal oxide clusters, and wherein the nanoscale particles and/or clusters comprise iron oxynitride.