Skip to main content
PLEASE NOTE: For everyone’s safety, Fasken requires anyone on-site at our Canadian offices to provide proof of full vaccination against COVID-19. This applies to lawyers, staff, clients, service providers and other visitors.
Marie Lafleur Montréal Partner/Associée

Marie Lafleur

Partner Fasken
Biologicals, a new class of pharmaceutical products, are booming in Canada.
Jurisdiction Quebec, 1983
Language(s) French, English
Office(s) Montréal

Marie Lafleur is a seasoned intellectual property litigator. She regularly appears before the courts in proceedings under the Patented Medicines (Notice of Compliance) Regulations and litigation concerning pharmaceutical patent infringement or invalidity.  Her expertise encompasses biologicals and biosimilars.


Marie has represented numerous companies in proceedings to prevent the Minister of Health from issuing Notices of Compliance that would allow generic versions of patented drugs to be sold, including citalopram, escitalopram, doxylamine/pyridoxine, cyclosporin, omeprazole, diltiazem, divalproex and terazosin.  

She has also successfully filed numerous applications to add or remove patents from the Health Canada register.  She was involved in many applications for judicial review of various decisions by provincial and federal health ministers.

Marie’s expertise covers every extraordinary remedy, particularly seizures before judgment and injunctions, and she fully masters the range of alternative dispute resolution mechanisms available.

  • Recognized as a leading practitioner in Intellectual Property Law by the Best Lawyers in Canada, The Best Lawyers in Canada 2018 to 2022
  • Recognized by IAM Patent 1000 – The World’s Leading Patent Professionals, IAM Patent 1000 2019 to 2021
  • Recognized by the Managing Intellectual Property IP Stars in the area of Patent, IP Stars 2018 to 2021
2019 to 2021 IAM Patent 1000 Recognized by IAM Patent 1000 – The World’s Leading Patent Professionals
2018 to 2021 IP Stars Recognized by the Managing Intellectual Property IP Stars in the area of Patent IP STARS is the leading specialist guide to IP law firms and practitioners worldwide.
Date Client


  • MBA Concordia University
  • BCL McGill University
  • LLB McGill University
  • DESS, Various courses, Drug Development, Faculty of Pharmacy Université de Montréal

Memberships & Affiliations

  • Member, Québec Bar
  • Member, Bar of Montréal
  • Member, Canadian Bar Association
  • Fellow Member, Intellectual Property Institute of Canada
Data Protection Fasken in-house seminar for clients location location Montréal
Fasken Training Day Program
Best Practices in NOC proceedings National Judicial Institute location location Ottawa


    Receive email updates from our team