Pier DeRoo

Finnegan Henderson Farabow Garrett & Dunner LLP

$ $$$

Washington 20268 DC US

Pier D. DeRoo has broad experience in strategic client counseling and patent litigation before U.S. district courts and the Patent Trial and Appeal Board (PTAB) of the U.S. Patent and Trademark Office (USPTO).

He has handled every stage of litigation, including pre-litigation investigations, discovery, dispositive motions, and trial. Pier has represented parties in dozens of proceedings before the PTAB, including as lead arguing counsel.

His experience includes inter partes review (IPR), interference, reexamination, and ex parte prosecution appeal proceedings across a range of technologies, including monoclonal antibody pharmaceuticals and other biologics, small-molecule drugs, solid-state materials for renewable energy devices, collaboration software, and internet security.

Pier has also represented pharmaceutical and chemical clients in a variety of litigation venues, including U.S. district courts, the Federal Circuit, arbitration, and the U.S. International Trade Commission (ITC). His litigation experience includes managing pre-suit investigations, conducting all stages of fact and expert discovery, acting as lead drafter of dispositive motions, and trial representation.

Pier particularly enjoys counseling innovative and growing clients on a diverse array of patent matters. He has prepared numerous validity, infringement, and freedom-to-operate opinions for clients in the life science and chemical fields, drawing on his extensive litigation background. He also has significant experience managing patent portfolios and providing strategic prosecution guidance in the chemical and electrical arts.

A substantial portion of Pier’s time is devoted to pro bono matters. He has represented disabled clients in several federal appeals, including as lead and backup counsel on amicus briefs before the Federal Circuit and the U.S. Supreme Court.

Education :

  • University of Michigan Law School J.D., with honors, 2011
  • Princeton University A.B., Chemistry, with honors, 2006

Admissions :

  • California
  • District of Columbia
  • Maryland
  • U.S. Court of Appeals, Federal Circuit
  • Supreme Court of the United States
  • U.S. Patent and Trademark Office

Professional Activities :

  • American Intellectual Property Law Association (San Francisco Bay Area networking leadership, New Lawyers Committee, 2017-present; Washington DC networking leadership, New Lawyers Committee, 2012-2015)
  • American Bar Association
  • Federal Circuit Bar Association


Rate : $$$$

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Washington 20268 DC US
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Lina Stillman

Broadway 42
New York 10006 NY US