“All Air Oasis air purifiers now contain our new patent-pending quad-nano Xtreme! catalyst coating.”

(Source: http://breathebetterair.com/howionicairpurifierworks.html)

“In March of 2006 our new quad-nano Xtreme!" catalyst coating was introduced. With this new patent-pending coating a fifth powerful catalyst metal was added. We also reduced the particle size of our metals down to a nanosize particle in order to increase the surface area and therefore increase the kinetic rate of reaction.”