US Patent 7758892 - Medical device with nanoparticle layer

http://www.freepatentsonline.com/7758892.html

This patent from Boston Scientific teaches a multilayered charged coating which facilitate manufacture of thin, flexible, and mechanically robust stents. Claim 1 reads:

1. A medical device comprising a multilayer region that comprises:

(a) a charged nanoparticle layer comprising charged nanoparticles;

(b) a plurality of charged polyelectroyte layers comprising charged polyelectrolyte species, and

(c) at least one charged therapeutic agent, wherein said medical device is configured for implantation or insertion into a subject.