hilary dorr lang, PhD

Hilary Dorr Lang, PhD
O: 615-953-7622 
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McNeill Baur PLLC
125 Cambridge Park Drive
Suite 301
Cambridge, MA 02140

Providing the bridge between patent law and your complex chemical inventions

Hilary Dorr Lang, PhD, prosecutes applications and counsels clients in the chemical arts. Her background as an organic chemist combined with her pharmaceutical industry and legal experience provides focused expertise to the firm’s clients. Hilary has used her knowledge and skills to support clients in developing global patent portfolios related to pharmaceutical and biologic products, including life cycle management of those portfolios. She has participated in patent landscape and freedom-to-operate analyses, and has assisted clients with many kinds of intellectual property agreements, monitoring potential competitors’ intellectual property activities, and drafting and review of license agreements.

During her career, Hilary has drafted and prosecuted patent applications across a broad spectrum of chemical arts, including small molecule drugs, drug delivery systems, cosmetics, nutritional products, polymers, and materials for medical devices. Hilary has also participated in litigation activities (including Hatch-Waxman litigation), opinions, and due diligence.

Hilary earned her BS in Chemistry with honors at the University of California at Santa Cruz, where she did undergraduate research in synthetic organic chemistry. She received her PhD in organic chemistry from The University of Chicago, with her dissertation titled “The Intramolecular Diels-Alder Reaction of Photochemically Generated Trans-Cycloalkenones.”

Hilary’s law degree is from Boston College Law School. While attending law school, she was a law clerk and summer associate at Finnegan, and continued on as an associate after graduation. She further expanded her skills and knowledge as an associate at Foley Hoag in Boston. After moving to Tennessee, Hilary was an associate and then counsel attorney at Patterson Intellectual Property Law, PC, where she assisted clients across a broad spectrum of intellectual property counseling and patent prosecution. 

Select Publications

Lead Compound Analysis Post-KSR,”  Intellectual Property Owners Association (IPO) White Paper, January 2010 (coauthor).

“Proposed Changes to Examination of Claims Containing Markush Language,”  BPLA Newsletter, April 2008 (coauthor).

Utilization of Fukuyama's Sulfonamide Protecting Group for the Synthesis of N-Substituted a-Amino Acids and Derivatives,” Tetrahedron Lett., 41(2):3309-3319 (2000) (coauthor).

The Intramolecular Diels-Alder Reactions of Photochemically Generated trans-Cycloalkenones,” J. Am. Chem. Soc., 121(43):10229-10230 (1999) (coauthor).

Developing a General Strategy for the Solid Supported Synthesis of Heterocycles: Applications to the Generation of Molecular Diversity and Drug Discovery,” Pure & Appl. Chem., 69(3):447-452 (1997) (coauthor).

A Facile Dehomologation of a-Substituted Aldehydes to the Corresponding Ketones” Tetrahedron Lett. 36(17):2921-2924 (1995) (coauthor).



District of Columbia


US Patent and Trademark Office



Boston College Law School

JD, 2005


The University of Chicago

PhD, Organic Chemistry, 2001


University of California at Santa Cruz

BS, Chemistry, 1994