U.S. District Court for the Northern District of Illinois

Illinois Northern District Court: Patent Litigation Profile

The U.S. District Court for the Northern District of Illinois, a major venue for intellectual property disputes, operates out of Chicago and Rockford and is part of the Seventh Circuit. Historically one of the busiest patent courts in the nation, it has consistently ranked among the top venues for patent case filings. Recent data places it as the fourth most active patent district, accounting for 8% of all new patent cases in the first half of 2025. This is largely driven by a significant surge in design patent litigation, with patent owners frequently filing suits against alleged counterfeiters on e-commerce platforms.

The court has a reputation for being a deliberative, rather than an expedited, venue. It is not considered a "rocket docket," with data from 2024 showing a median time to civil trial of nearly five years (59.7 months). A 2022 analysis noted an average time-to-trial of 43 months specifically for patent cases, significantly longer than in Texas-based district courts. Despite the slower pace, the district is noted for having a higher rate of patent-owner wins in non-pharmaceutical cases compared to the Eastern and Western Districts of Texas. The court is also perceived as relatively favorable to defendants seeking to pause litigation pending Patent Office review, with a historical grant rate of 66% for motions to stay pending inter partes review (IPR).

Patent litigation is highly structured by the court's comprehensive Local Patent Rules (LPRs), first adopted in 2009. These rules are intended to streamline discovery and create predictability. Key features include a mandatory two-stage process for disclosing infringement and invalidity contentions ("Initial" and "Final"). The LPRs also impose specific limits, requiring plaintiffs to narrow their case to no more than 10 claims per patent and 20 claims overall in their Final Infringement Contentions. While the rules provide a default schedule aiming for trial readiness in under two years, recent court-wide statistics indicate that actual time to trial is considerably longer.

The court's recent docket has been characterized by a high volume of design patent and trademark cases targeting online retailers, a trend reflected in tracked cases such as Conair LLC v. Tehrani Corp et al. and Ritfit LLC et al. v. Ningbo Huayue Dianzi Shangwu Youxian Gongsi et al. The district was part of the ten-year Patent Pilot Program, designed to cultivate judicial expertise in patent matters. Judges from the district with experience in patent cases include Sharon Johnson Coleman and Heather K. McShain, who are assigned to cases currently being tracked.