A Standard Document preliminary response to a petition for post-grant review (PGR) under the Leahy-Smith America Invents Act (AIA) that a patent owner's counsel may use as a starting point to respond to a PGR petition filed at the Patent Trial and Appeal Board (PTAB). It includes optional language the patent owner's counsel may use to raise procedural challenges to the petition and substantive responses to the petitioner's proposed claim constructions and asserted grounds of unpatentability. This Standard Document has integrated drafting notes with important explanations and drafting tips.