US Patent 7384680 - Inorganic nanopowder film

http://www.freepatentsonline.com/7384680.html

This patent from a company called Nanogram is fairly basic to inorganic nanopowder thin films which may be important to future printable electronics and optics applications. Claim 1 reads:

1. A substrate comprising a powder coating comprising an inorganic composition, the powder coating comprising primary particles having an average particle size less than about 500 nm and effectively no primary particles having a diameter greater than about 4 times the average primary particle diameter wherein the powder coating has an approximately uniform thickness across at least a portion of a substrate surface and wherein the powder coating forms a porous network of fused inorganic particles wherein the powder coating has a thickness from about 50 nm to about 500 microns.