Simeon G. Papacostas

Simeon G. Papacostas — Patent Litigation Practice Summary

Papacostas is a Chicago-based intellectual property litigator at Benesch Friedlander Coplan & Aronoff LLP (partner; joined as of counsel in December 2020). His practice centers on patent litigation in federal district courts and post-grant proceedings before the USPTO, with firm-bio and press materials describing work across medical devices, pharmaceuticals, biotechnology, oilfield/drilling services, computer hardware and software, consumer products, video games, and LED lighting. He joined Benesch from Honigman LLP (partner, 2017–2020) and, before that, Kirkland & Ellis LLP in New York. No in-house roles identified.

In the tracked dockets, Papacostas appears exclusively for plaintiff Feit Electric (2 of 2 appearances) — as out-of-state counsel in Feit Electric Co. v. Elong International USA (N.D. Tex., asserting LED filament patent U.S. 8,604,678) and as trial counsel in Feit Electric Co. v. Ledvance (E.D. Ky., same patent). His broader practice runs both sides of the docket for operating companies, however, not NPE/PAE work: he led Feit Electric's successful defense in Nichia Corp. v. Feit Electric (C.D. Cal.), where a jury returned a no-infringement verdict on Nichia's LED bulb patent in January 2023 (final judgment entered February 2, 2023; covered by Law360 as "Jury Clears Feit of Infringing Nichia LED Light Patent"), and he continues to defend Feit in Seoul Semiconductor/Seoul Viosys v. Feit Electric (C.D. Cal.).

He has regular PTAB/IPR exposure: his bio lists post-grant proceedings as a core focus, he appeared on IPR dockets during his Kirkland years (e.g., WesternGeco v. ION Geophysical, IPR2015-00565), and the Feit matters are entangled in IPRs against the '678 patent (IPR2024-01357 and related proceedings), where he acts on the patent-owner side. He has argued before the Federal Circuit and tried cases to juries. Education, per his firm bio: J.D., Washington University School of Law (2008, cum laude); B.S. in biomedical/biomechanical engineering, Yale University (2002); admitted in Illinois and New York, the Federal Circuit, and multiple district courts.