Xiaomei Cai is an associate in the Intellectual Property & Technology practice, representing clients from a wide range of industries in intellectual property disputes, including Hatch-Waxman litigation, biologics litigation, chemistry, semiconductors, and Wi-Fi technology, focusing on pharmaceutical and biotechnology.

Xiaomei’s practice encompasses all facets of complex patent litigation, including pre-suit investigation and counseling, discovery, claim construction and Markman hearings, trials, post-trial, injunction proceedings and appeals, before federal courts, as well as regulatory proceedings such as inter partes review before the PTAB. Xiaomei combines scientific acumen with a keen understanding of the legal issues that surround bringing new technology products and innovative services to market.

Xiaomei has served as a judicial intern in the US District Court for the Southern District of Illinois, a summer intern with the US Department of Education, Office of Civil Rights, and a full-time employee in the genetic testing department of a cell and gene engineering company.

Prior to joining the firm, Xiaomei was an associate at a boutique patent litigation law firm in Chicago representing generic pharmaceutical companies in Hatch-Waxman litigations.

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  • Washington University School of Law, J.D., 2017
  • Tianjin University (China), M.S., Pharmaceutical Sciences, 2014
  • Tianjin University (China), B.S., Pharmaceutical Sciences, 2011


  • Arizona, 2023
  • Illinois, 2017


  • Court of Appeals for the Federal Circuit, 2020
  • Illinois Northern District Court, 2017


  • Mandarin
  • English
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Award Mouse thought multimedia interface book medal screen monitor