Kathleen Williams, Nutter McClennen & Fish LLP Photo

Kathleen M. Williams

Co-Chair of the Life Sciences practice group / Boston


Kathleen M. Williams, Ph.D., is a partner in Nutter’s Intellectual Property Department and the co-chair of the firm’s Life Sciences practice group. She advises clients in the life sciences industry on all aspects of patent law, including patent portfolio creation and management, patentability of inventions and commercialization in view of third-party patents, patent prosecution, and patent life cycle management.

Emerging and mature life sciences companies, research institutions, and investors frequently turn to Kathleen for guidance on patent strategy and complex legal issues surrounding the protection of discoveries in the life sciences. Kathleen has extensive experience in complex patent interferences before the Patent Trial and Appeal Board (PTAB) of the U.S. Patent and Trademark Office as well as in inter partes reviews (IPRs). She often handles intellectual property due diligence for corporate transactions such as acquisitions, investments, licenses, and initial public offerings.  

Drawing on her scientific expertise, Kathleen advises clients in a broad range of fields, including:

  • Biology
  • Biochemistry
  • Diagnostic methods, biomarkers
  • Devices in the areas of biotech, pharmaceuticals, therapeutics, diagnostics, nanotechnologies, bio-energy, cleantech, and medicine
  • Gene expression regulation by siRNAs, antisense, microRNAs, oligonucleotides
  • Immunology
  • Molecular biology
  • Pharmacology
  • Small molecule therapeutics
  • Tissue engineering

A sought-after speaker, Kathleen often presents at conferences and is quoted in the media about patents, biotechnology, and cutting-edge intellectual property issues. She earned her Ph.D. in molecular biology and biochemistry from Brown University.

Prior to joining Nutter, Kathleen was a partner and the chair of the life sciences practice group at a New England-based intellectual property law firm.

News & Insights





  • “Life Science Star,” LMG Life Sciences, 2012, 2019-2020
  • Massachusetts Super Lawyers, 2014-2020
  • The Best Lawyers in America, 2020

Education & Admissions


Smith College, B.A., with honors
Brown University, Ph.D.
New England School of Law, J.D.


  • Massachusetts
  • U.S. Patent and Trademark Office
  • U.S. Supreme Court
  • U.S. Court of Appeals for the Federal Circuit


  • “Life Science Star,” LMG Life Sciences, 2012, 2019-2020
  • Massachusetts Super Lawyers, 2014-2020
  • The Best Lawyers in America, 2020-2021
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