In a modern patent case -- with dozens of claims and zillions of similar accused products -- there are innumerable possible permutations of infringement and invalidity outcomes.
This can make it pretty difficult to craft a stipulation on undisputed issues.
This was the hard lesson in Janssen Pharms, Inc. v. Tolmar, Inc., C.A. No. 21-1784-WCB, D.I. 198 (D. Del. June 13, 2024). In that ANDA case, the defendant had stipulated that "if any of claims 1–7, claim 15, and claims 17–21 (as dependent from claims …