A patent owner response to a petition for inter partes review (IPR) under the Leahy-Smith America Invents Act (AIA) after institution of an IPR proceeding by the Patent Trial and Appeal Board (PTAB). It includes language the patent owner's counsel may use as a starting point to respond to the grounds on which the PTAB has instituted the IPR, including an overview of the challenged patent and technological background, level of ordinary skill in the art, claim construction, and substantive responses to instituted challenge grounds. This Standard Document has integrated drafting notes with important explanations and drafting tips.