Justin Ehresmann, Ph.D., Lewis Roca Photo

Justin O. Ehresmann, Ph.D.

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Justin solves tough problems by finding unexpected solutions.

Justin Ehresmann is a partner in Lewis Roca’s Intellectual Property Practice Group. Clients turn to Justin for his knowledge of OLEDs (organic light-emitting diodes), solar cells, fuel cells, microstructures, polymers, pharmaceuticals, and catalysts. Of particular interest to Justin are chemical production and new catalyst development.

Justin has extensive research experience relating to heterogeneous catalysis, inorganic chemistry, solid state nuclear magnetic resonance spectroscopy, computational chemistry, microporous materials, and zeolites. He is co-author of numerous scientific publications in leading Chemistry journals.

Justin received his Ph.D. in chemistry and his undergraduate degree in environmental studies from the University of Southern California, enabling him to offer a unique skill set to biotech and chemical firms in need of legal counsel. He is the co-author of numerous technical publications, and serves as an adjunct faculty member of the Environmental Studies Program at the University of Southern California. 

Personal Approach

Justin enjoys working collaboratively with clients to solve complex problems. His calm, patient and reassuring demeanor inspires confidence and ensures that careful deliberation will lead to sound decision-making. Justin’s ability to pivot and adapt in situations is an ideal asset in the ever-changing IP world. His clients value his depth of understanding of the science and technology impacting their business and his guidance in crafting legal and IP portfolio strategies. 

Justin’s interests include mountain biking, surfing, paddle boarding, and restoring classic cars.

More About Justin O. Ehresmann, Ph.D.


  • J.D., Loyola Law School, 2009
  • Ph.D., Chemistry, University of Southern California, 2005
  • B.S., Environmental Studies, University of Southern California, 2000

Bar Admissions

  • California, 2009
  • U.S. Patent and Trademark Office


  • California Bar Association, Member


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