Allergan Sales, LLC v. Sandoz, Inc., No. 18-2207 (Fed. Cir. 2019)Annotate this Case
Allergan’s patents, entitled “Combination of Brimonidine and Timolol for Topical Ophthalmic Use,” the Patents-in-Suit share a common specification that relates “to the topical ophthalmic use of brimonidine in combination with timolol . . . for treatment of glaucoma or ocular hypertension.” Allergan sued Sandoz, asserting that Sandoz’s Abbreviated New Drug Application (ANDA) for a generic version of Allergan’s ophthalmic drug Combigan® infringed those patents. The district court granted Allergan a preliminary injunction. The Federal Circuit affirmed, limiting a number of “wherein” clauses in the patents. Both Allergan and the Examiner explicitly relied on the “wherein” clauses to distinguish the claimed methods over the prior art during prosecution. The “wherein” clauses were neither unnecessary nor irrelevant.