Case narrowing is an issue that comes up in most patent cases at some point, whether in the scheduling order, as a discovery dispute, or at the pretrial conference (or, possibly, all three).
When requested, judges in Delaware typically implement an initial two-stage reduction in asserted claims and prior art references, with the first stage occurring before claim construction, and the second afterward.
Of course, sometimes they will implement other schedules depending on the needs of the case and the requests of the parties. And, for cases that reach a pretrial conference, the Court often imposes an additional limit on the number of claims for …