US Patent 7993748 - Encapsulated chromonic nanoparticle

http://www.freepatentsonline.com/7993748.html

Chromonic materials are important to liquid crystal displays and have also been shown to be useful for applications in drug delivery. This patent from 3M teaches chromatic nanoparticles useful for controlled drug delivery. Claim 1 reads:

1. A multilayered chromonic structure comprising:

a chromonic nanoparticle encapsulated in a shell layer of chromonic material, wherein at least one of the chromonic nanoparticle or the shell layer of chromonic material comprises a guest compound.