Feit Elec. Co., Inc. v. CFL Techs., LLC, Slip Op., No. 13 C 9339, (N.D. Ill. Kendall, C.J. & McShain, Mag. J.) (Oct. 22, 2025).
Chief Judge Kendall affirmed Magistrate Judge McShain’s order denying declaratory judgment defendant and patentholder CFL Technologies’ (CFL) motion to compel and for spoliation sanctions. The decision is a cautionary tale on timeliness and strategy in complex patent litigation, particularly in increasingly common long-stayed, complex patent cases.
CFL sought broad discovery concerning “all non-dimmable Feit CFLs,” vendor identities, and confidential materials under Local Patent Rule 1.4’s default protective order, reviving disputes first raised in 2018 but not pursued until nine-and-a-half months after a discovery stay was lifted in 2021. The Magistrate denied the motion as untimely and later declined CFL’s sanctions motion. The District Court affirmed under Fed. R. Civ. P. 72(a)’s deferential “clearly erroneous or contrary to law” standard.
The Court affirmed that district courts have broad discretion to deny motions to compel for undue delay, even before discovery closes. The Court cataloged extended periods of inaction, party representations that no ripe disputes existed, and the reality that resolving the motion would force a discovery extension—previously denied for lack of good cause. Arguments that CFL prioritized other litigation issues, or believed a meet-and-confer resolved long-pending disputes, were insufficient. The Court also confirmed that parties cannot defer motion practice on foundational disputes while negotiating protective orders late in discovery and then salvage delay by claiming a new “impasse.”
On sanctions, the Court upheld denial of an adverse inference for alleged spoliation of product samples. The Court required evidence of intentional destruction in bad faith to conceal adverse evidence—a stringent standard that mere unavailability of samples does not satisfy, especially where product lines sunset over time and the later-accused products were not identified until years into the case.
Two practitioner takeaways stand out. First, timeliness is measured by the totality of conduct: delay length, explanations, and contemporaneous actions. Courts in the Northern District often, although not always, deny late-arising motions that would require reopening discovery absent compelling justification. Second, Rule 72(a) review is a high bar—objections must demonstrate misapplication of law or clear factual error, not merely disagreement with case management decisions. Strategically, preserving discovery disputes contemporaneously, documenting meet-and-confers, and moving promptly where impasse is evident are best practices, recognizing that each of those is a somewhat subjective requirement.

