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Mary LaFleur

Phone: +1 312.840.3272
455 N. Cityfront Plaza Drive
Suite 3600
Chicago, IL 60611

With backgrounds in business and chemistry, Mary LaFleur's practice focuses on patent litigation in a variety of fields including pharmaceuticals, biotechnology, mechanical inventions, and medical devices. She has specific technical experience with biochemistry, biopharma, drug research, inorganic chemistry, and organic chemistry and synthesis.

While an extern for the Honorable John Robert Blakey at the United States District Court for the Northern District of Illinois, Mary was immersed in the practices and procedures of federal court litigation.


  • Indiana University, B.A. Chemistry (2016) cum laude
  • Illinois Institute of Technology, Praxis Program Certificate (2019)
  • Illinois Institute of Technology, Intellectual Property Certificate (2019)
  • Chicago-Kent College of Law, J.D. (2019) magna cum laude


  • Chicago Women in IP, Member
  • Intellectual Property Law Association of Chicago, Vice President of the Women in IP Committee

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Crowell & Moring LLP is an international law firm with offices in the United States, Europe, MENA, and Asia that represents clients in litigation and arbitration, regulatory and policy, and transactional and corporate matters. The firm is internationally recognized for its representation of Fortune 500 companies in high-stakes litigation and government-facing matters, as well as its ongoing commitment to pro bono service and diversity, equity, and inclusion.

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