Duncan A Greenhalgh

Duncan A. Greenhalgh

Duncan A. Greenhalgh
+1 617 570 1299

Duncan Greenhalgh is a partner in Goodwin's nationally recognized Life Sciences and Technology groups. His practice focuses on developing and implementing complex intellectual property and market exclusivity strategies for life sciences companies and research institutions. Dr. Greenhalgh also represents venture capital firms on intellectual property matters relating to their portfolio company investments, and investment banks in connection with capital market transactions.

Dr. Greenhalgh has been recognized by Chambers USA: America’s Leading Lawyers for Business (2009-2020), LMG Life Sciences (2012-2014, 2016-2020), Managing IP - IP Stars (2012-2020), The Best Lawyers in America (2017-2021) and Intellectual Asset Management’s Patent 1000 (2015-2020) as an industry leader for his intellectual property expertise in life sciences.


Dr. Greenhalgh has extensive experience counseling biotechnology, pharmaceutical, diagnostics and medical device companies, research institutions and hospitals on intellectual property matters, with particular emphasis on the procurement and enforcement of patent rights. He specializes in developing and managing domestic and foreign patent portfolios, including developing, implementing and expediting complex prosecution strategies in the United States and abroad, and has handled numerous post grant proceedings, including reissue, ex parte and inter partes reexamination, and interference proceedings at the United States Patent and Trademark Office, and foreign patent opposition proceedings. Dr. Greenhalgh has obtained patent protection for various FDA-approved therapeutics and diagnostics, and advises clients on life cycle management issues.

Dr. Greenhalgh conducts intellectual property due diligence investigations in connection with various transactions, including investments in public and privately held companies, public offerings, licensing transactions, strategic alliances, and mergers and acquisitions.

Representative Matters

  • Allena Pharmaceuticals in the development of its global patent estate and its $75 million initial public offering
  • AVEO Pharmaceuticals on patent matters relating to its product candidates, initial public offering and follow-on offerings, and strategic partnerships
  • Cabaletta Bio on patent matters, its $25 million Series A financing and $74 million initial public offering
  • Catabasis Pharmaceuticals in the development of its global patent estate and its $60 million public offering and follow-on offerings
  • Esperion Pharmaceuticals in its patent matters, its $510 million collaboration agreement with Otsuka Pharmaceutical Co., Ltd., which is recognized as the largest Japan territory pharmaceutical licensing deal in the last 10 years, and its $70 million initial public offering and follow-on offerings
  • Lysosomal Therapeutics Inc. in the development of its global patent estate and in its partnering and licensing matters
  • Palleon Therapeutics in its patent matters, $47 million Series A offering, licensing matters, and successful defense of European patent during opposition proceedings
  • ProQR Therapeutics in its patent matters and its $97.5 million public offering and follow-on offerings
  • Full life cycle patent strategy on behalf of global pharmaceutical company with approved product, including expedited patent prosecution, patent term extension, and related Orange Book listings
  • Ongoing representation of various privately held and public companies and research institutions including Altus Formulation, Artisan Cells, Biohm Health, Cadila Healthcare, Cullinan Oncology, Charles River Laboratories, Endomedix, EpicentRx, GliaCure, Inc., LumiraDx, Massachusetts Eye and Ear Infirmary, NeoTx, Paladin Labs, Pierian Biosciences, Seastar Medical, and  VisEn Medical, in intellectual property matters

  • Representation of underwriters during initial public offerings and follow-on offerings for AC Immune, Argos Therapeutics, Arvinas, Beigene, BeyondSpring Pharmaceuticals, Inc., Edge Therapeutics, Genfit, InFlaRx, Intercept Pharmaceuticals, Intrexon Corporation, OvaScience, Sarepta Therapeutics, Supernus Pharmaceuticals, and Tokai Pharmaceuticals
  • Representation of issuers during initial public offerings and follow-on offerings for Allena Pharmaceuticals, AVEO Pharmaceuticals, ArgenX, BioAmber, Cabaletta Bio, Catabasis Pharmaceuticals, Orchard Therapeutics, and ProQR Therapeutics
  • Lightstone Ventures and others in connection with venture investment in Catabasis Pharmaceuticals
  • Atlas Venture and others in connection with venture investments in Harbour Antibodies and Lysosomal Therapeutics Inc.
  • Xeraya Capital in connection with its investments in numerous portfolio companies

Professional Activities

Dr. Greenhalgh is a member of a number of professional organizations, including the American Intellectual Property Law Association, the American Bar Association, the Boston Bar Association and the Boston Patent Law Association.

Professional Experience

Prior to joining Goodwin in 2005, Dr. Greenhalgh was a member of the Patent and Intellectual Property Group at Testa, Hurwitz & Thibeault LLP in Boston from 1993 until 2005.




Suffolk University School of Law

(magna cum laude)

Doctor of PhilosophyBiochemistry1989

University of Leeds


University of Leeds

(with honors)



  • Massachusetts
  • U.S. Patent and Trademark Office (USPTO)


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

Recognition & Awards

Dr. Greenhalgh has been recognized by The Best Lawyers in America Best Lawyers for his work in Biotechnology and Life Sciences Practice 2022-2023 and Patent Law 2023.

Dr. Greenhalgh has been recognized for his work in MA – Prosecution / MA – Transactions in 2021 by The IAM Patent 1000.

Dr. Greenhalgh has also been selected for inclusion in Chambers USA: America's Leading Lawyers for Business, 2009-2022, LMG Life Sciences, 2012-2014 and 2016-2020, The Best Lawyers in America (2017-2021) and Managing IP - IP Stars, 2012-2020.


Dr. Greenhalgh is a frequent speaker on intellectual property matters both in industry settings and at Boston-area universities.