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Marie Lafleur Montréal Partner/Associée

Marie Lafleur

Partner Fasken
Biologicals, a new class of pharmaceutical products, are booming in Canada.
Jurisdiction Québec, 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 the Managing Intellectual Property IP Stars in the area of Patent, IP Stars 2018 to 2022
  • Recognized by IAM Patent 1000 – The World’s Leading Patent Professionals, IAM Patent 1000 2019 to 2021
2018 to 2022 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.
2019 to 2021 IAM Patent 1000 Recognized by IAM Patent 1000 – The World’s Leading Patent Professionals

Client Work

Date Client

Career & Education


  • 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


Fasken Institute



Speaking Engagements

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


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