Our Team Members

Roy Chamcharas


Roy’s practice focuses on pharmaceutical patent infringement litigation.He has experience in all facets of litigation, including fact and expert discovery matters, pre‐trial and trial phases of federal litigation, as well as experience at the federal appellate level. Roy has litigation experience with a wide variety of patents and technologies, including small‐molecule organic compounds, pharmaceutical compositions and formulations, polymorph characterization, methods of treatment, medical devices, and drug delivery technologies. Roy also advises clients regarding post-grant procedures, including inter partes review proceedings, as well as non-infringement and invalidity opinions.

Examples of drugs Roy has been involved in patent litigation include Narcan® (naloxone), Prevacid® (lansoprazole), Pennsaid® (diclofenac), Ravicti® (glycerol phenylbutyrate), Nasonex® (mometasone furoate), Trizivir® (abacavir, lamivudine, and zidovudine), Toviaz® (fesoterodine), and Sprycel® (dasatinib).

Prior to joining Green, Griffith & Borg‐Breen LLP, Roy was an associate at Rakoczy Molino Mazzochi Siwik LLP and DLA Piper LLP. He also served as a judicial extern to the Honorable Rebecca R. Pallmeyer, United States District Court Judge for the Northern District of Illinois.

Before entering the legal profession, Roy worked as a research engineer for Air Liquide, Inc., where he researched semiconductor precursor chemicals using a variety of analytical techniques including differential scanning calorimetry (DSC), IR and UV/vis spectroscopy, gas and liquid chromatography, KarlFischer titration, scanning electron microscopy (SEM), and particle counters. He also researched a variety of semiconductor fabrication processes such as copper plating, chemical vapor deposition (CVD) tools, chemical‐mechanical planarization (CMP) slurries, solvent purification, metallo‐organic chemical distillation, and ultra‐high vacuum distribution of high purity chemicals.


Chicago‐Kent College of Law, J.D., with honors
       Chicago-Kent Law Review
       Seventh Circuit Review
University of Illinois at Urbana-Champaign, B.S., Chemical Engineering

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