(October 27, 2017, 1:50 PM EDT) -- ALEXANDRIA, Va. — A formula for phosphoramidate prodrugs of nucleoside derivatives would have been obvious to a person of ordinary skill, according to an Oct. 26 petition for inter partes review (IPR) filed with the Patent Trial and Appeal Board (Initiative for Medicines, Access & Knowledge Inc. v. Gilead Pharmasset LLC, No. IPR2018-00122, PTAB)....