Patterson Intellectual Property Law

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Hilary Dorr Lang, Ph.D.

Of Counsel

Hilary Lang has extensive experience developing and managing domestic and international patent portfolios, conducting freedom to operate analyses, and preparing patentability and non-infringement opinions in the life sciences industry. Dr. Lang has obtained numerous domestic and foreign patents for both corporate and academic clients in a variety of technology areas, including pharmaceuticals, biotechnology, drug delivery, polymers, petroleum products, medical devices, cosmetics, nutraceuticals and food products. She also has experience in patent litigation, including Hatch-Waxman litigation.

Dr. Lang previously practiced in Boston, and has more than a decade of IP legal experience. Prior to her career in patent law, Dr. Lang obtained her Ph.D. in Chemistry from the University of Chicago, where her research focused on synthetic organic chemistry methodology, particularly using photochemistry. She also has drug discovery experience, having served as a research associate at Chiron Corporation, where she developed synthetic methods on solid support to prepare libraries of chemical compounds.

Representative Patents


  • J.D., Boston College Law School, 2005
  • Ph.D., Chemistry, University of Chicago, 2001
  • B.S., Chemistry, with Honors, University of California at Santa Cruz, 1994

Bar Admissions

  • Massachusetts
  • District of Columbia
  • Tennessee
  • Registered Patent Attorney (USPTO)

Professional Memberships

  • American Intellectual Property Law Association
  • Life Science Tennessee, Board of Directors Member
  • American Bar Association
  • The American Chemical Society, Organic Chemistry Division
  • Lawyers’ Association for Women
  • Tennessee Intellectual Property Law Association


  • “Lead Compound Analysis Post-KSR.” IPO White Paper, Ted Ebersole, Hilary Lang, Patricia Folkins, January 2010
  • “Proposed Changes to Examination of Claims Containing Markush Language.” BPLA Newsletter, April 2008
  • “The Intramolecular Diels-Alder Reactions of Photochemically Generated trans-Cycloalkenones.” American Chemical Society, 1999