Acorda Therapeutics announces Hatch-Waxman extension of AMPYRA® (dalfampridine) sustained-release formulation patent Acorda Therapeutics, 16 Oct 2012 Accessed on 1 Nov 2012 from http://ir.acorda.com/phoenix.zhtml?c=194451&p=irol-newsOtherArticle&ID=1745632. CommentRecommendBookmarkWatch