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Thomas L. Irving
+1 202 408 4082

901 New York Avenue, NW
Washington, DC 20001-4413

+1 202 408 4000
Fax +1 202 408 4400

Bar and Court Admissions

  • District of Columbia
  • U.S. Patent and Trademark Office
  • U.S. Court of Appeals, Federal Circuit


  • Duke University School of Law
    J.D., 1977
  • University of Utah
    B.A., Chemistry, magna cum laude, 1974


  • Spanish

Thomas L. Irving


Tom Irving has nearly 40 years of experience in the field of intellectual property law. His practice includes due diligence; patent prosecution; reissue and reexamination; patent interferences; AIA post grant proceedings; and counseling. He counsels clients on a wide chemical/pharmaceutical matters, including prelitigation, Orange Book listings of patents covering FDA-approved drugs, infringement issues; enforceability and validity analysis, and litigation. He has served as lead counsel in numerous patent interferences, reissues, and reexaminations, and as an expert witness in patent litigation.

Mr. Irving has been involved in every facet of several U.S. district court litigations, thus enhancing his ability to render advice in due diligence, enforceability, infringement, validity, and patent prosecution areas. Outside of the patent law field, he has been involved in public health and safety issues related to the preparation of Citizen Petitions before the FDA.

Mr. Irving has served for more than 20 years as principal teacher of the PRG Chemical Patent Practice course, a comprehensive U.S. chemical patent law course taught three times a year, and he coauthors the multi-volume treatise used in the course. He originated PRG's Orange Book and Due Diligence courses as well as PRG's course taught three times a year to prepare patent owners, through effective application drafting and prosecution, to withstand the rigors of AIA's inter partes review and post grant review. He presents analyses of U.S. Court of Appeals for the Federal Circuit patent decisions for many state bar association groups and is a frequent speaker at national bar association meeting such as the American Intellectual Property Law Association (AIPLA), Intellectual Property Owners Association, and American Bar Association. Mr. Irving has lectured at many law schools in both the United States and China. He also has lectured at the Cold Spring Harbor National Laboratory graduate school, the Patent Office of the State Intellectual Property Office (SIPO) of the People's Republic of China, and has presented 30 Strafford Webinars.


  • N8 Medical v. Colgate-Palmolive Company (D. Utah). Serves as technical advisor in U.S. district court litigation.
  • Successfully prosecuted the anti-cancer taxane small molecule interference Chen v. Bouchard, prevailing both at the U.S. Patent and Trademark Office Board and the Federal Circuit.
  • Successfully reissued the patent for the low molecular weight heparin drug, Lovenox®, a blockbuster product.
  • Extensively involved in counseling, due diligence, prosecution and prelitigation for other matters involving major drugs such as Aloxi®, Tecfidera®, Lorcaserin®, Pulmicort®, Respules®, Taxotere®, Eloxatin®, Lantus®, Crestor®, Targretin®, Brilinta®, Halaven®, and Allegra®, as well as Apidra®, Epiduo Gel®, Rilutek®, Ramipril®, Duexis®, and Viracept®, and other drugs such as Rimonabant® and HMPL 0004®, in clinical trials prior to FDA approval.
  • Presides as judge over AIA post-grant proceeding mock trials in preparation for PTAB trials.
  • Opened the firm's first European office in Brussels, Belgium, 1993.

Professional Recognition

  • Selected by his peers for inclusion in The Best Lawyers in America,
  • Recognized as a Washington, DC "Super Lawyer" in Intellectual Property Litigation, Super Lawyers Magazine, 2008-2010, 2013-2014.
  • AV-Preeminent® and AV® rated by Martindale-Hubbell.
  • Recognized as a leading patent prosecutor in the D.C. area by Intellectual Asset Management, 2012-2014.
  • Listed in LMG Life Sciences as an Intellectual Property: Life Sciences Star, 2012-2014.

Professional Activities

  • AIPLA (chair, Chemical Practice Committee, 1991; and member, Board of Directors, 1992-1994)
  • Institute of Intellectual Property and Social Justice, Howard University School of Law (co-chair, 2008 - present)

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