Daicel Corporation v. Celanese Int’l Corp., No. IPR2015-00171, Paper No. 86 (P.T.A.B. June 23, 2016) sheds important insight on how the Board applies the broadest reasonable interpretation (BRI) standard for claim construction, and the application of intrinsic and extrinsic evidence.  In that case, the Board instituted an IPR based on both § 102(b) and