A stable solid controlled release formulation having a coating derived from an aqueous dispersion of a hydrophobic acrylic polymer includes a substrate including an active agent selected from the group consisting of a systemically active therapeutic agent, a locally active therapeutic agent, a disinfecting...http://www.google.com.au/patents/US7070806?utm_source=gb-gplus-sharePatent US7070806 - Controlled release formulations coated with aqueous dispersions of acrylic polymers
