Kevin DeJong, a counsel in Goodwin’s Litigation group, focuses his practice on intellectual property litigation. Mr. DeJong has experience in a broad range of intellectual property litigation matters, including patent, trademark and trade secret matters. He has advised clients in a variety of intellectual property-related litigations in the pharmaceutical, medical device, consumer product and software industries.

Mr. DeJong has particular expertise in ANDA cases under the Hatch-Waxman Act and cases involving biosimilars under the BPCIA. Mr. DeJong brings to his practice an exceptional combination of patent law expertise and technical proficiency in the pharmaceutical and biotechnology fields. He holds a degree in chemical engineering, and before pursuing a career in law, he worked in the biotechnology industry as a process engineer responsible for process development, scale-up, and equipment design for cell culture and protein purification processes.

Mr. DeJong also devotes a significant amount of time representing pro bono clients in a variety of matters. In particular, Mr. DeJong has represented many unaccompanied children seeking to obtain permanent resident status.





Mr. DeJong's representative matters include:

  • Genentech et al. v. Celltrion et al. (D. Del.), representing Celltrion/Teva in suit under the BPCIA related to biosimilar of Herceptin.
    * See
  • Genentech et al. v. Celltrion et al. (D. N.J.), representing Celltrion/Teva in suit under the BPCIA related to biosimilar of Rituxan.
  • Gillette v. Dollar Shave Club (D. Del.), representing Gillette in a suit involving patents on razor blade edge coatings.
  • Tris Pharma, Inc. v. Actavis Elizabeth LLC (D. Del.), representing Actavis in ANDA case involving methylphenidate hydrochloride extended-release chewable tablets.
  • Dow Pharma. Sciences v. Teva (D. N.J.), represented Teva in ANDA case involving clindamycin phosphate and benzoyl peroxide gel.
  • Teva Pharmaceuticals USA et al. v. Sandoz, Inc. et al. and Mylan Pharmaceuticals Inc. et al. (S.D.N.Y.). Represented patent owner in Hatch-Waxman dispute regarding generic version of Copaxone, a complex mixture of polypeptides. Was part of trial team that obtained decision in favor of Teva finding all claims infringed, valid, and enforceable.
  • Teva Pharmaceuticals USA et al. v. Sandoz, Inc. et al. and Mylan Pharmaceuticals Inc. et al. (S.D.N.Y.). Represented patent owner in patent litigation involving techniques to measure the molecular weight of complex mixtures of polypeptides.
  • Momenta Pharmaceuticals v. Teva Pharmaceuticals (D. Mass). Represented Teva in patent litigation related to methods of evaluating low molecular weight heparins.
  • iHance, Inc. v. Eloqua Ltd. (E.D. Va.). Represented Eloqua in patent litigation involving technology for monitoring email and website behavior of email recipients.
  • Abbott Point of Care, Inc. v. Epocal, Inc. (N.D. Ala.). Represented Epocal in patent litigation dispute related to point-of-care blood testing diagnostic devices. Was part of trial team that obtained jury verdict in Epocal’s favor in finding no infringement.
  • X-ray Optical Systems v. Innov-X (N.D.N.Y.). Represented Innov-X in patent ownership dispute relating to x-ray optics technology.
  • Asentinel LLC v. The Info Group, Inc. et al. (W.D. Tenn.). Represented Veramark in patent litigation involving technology used in analyzing telecommunications invoices.
Professional Activities

Mr. DeJong is a member of the Boston Intellectual Property Inn of Court, the Boston Bar Association and the New Hampshire Bar Association. Mr. DeJong also serves as an editor of the firm’s biosimilars blog, Big Molecule Watch.

Professional Experience

Prior to joining Goodwin, Mr. DeJong worked as an engineer in the pharmaceutical and biotechnology industry. He has extensive experience in pharmaceutical and biotech manufacturing, process development and scale-up, and equipment design.


Patexia named Mr. DeJong as a top ANDA litigator in 2020. While attending law school, Mr. DeJong served as Editor-in-Chief of the 49th Volume of IDEA: The Intellectual Property Law Review.

In The News









J.D., 2009
University of New Hampshire School of Law

(magna cum laude)

B.S., Chemical Engineering, 1999
Northwestern University



U.S. Patent and Trademark Office (USPTO)
New Hampshire


U.S. Court of Appeals for the Federal Circuit
U.S. District Court for the District of Massachusetts
U.S. District Court of New Hampshire
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