B. Dell Chism

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Clients benefit from Dell Chism's extensive technical knowledge in complex matters involving biotechnology intellectual property. Mr. Chism’s experience involves the preparation and prosecution of U.S. and foreign patent applications in the chemical, biochemical, pharmaceutical, dietary supplement and biotechnology fields. His background also includes the preparation and research of freedom-to-operate, validity, infringement and patentability opinions for Fortune 500 companies. Mr. Chism joined Porzio in September 2014 from Patton Boggs LLP.

Mr. Chism has represented clients in arbitrations and in litigations before multiple state and federal courts, including Federal District Courts and the Federal Circuit.  He has litigated under the Hatch-Waxman Act on issues related to Paragraph IV filings for Abbreviated New Drug Applications (ANDA), trade secret theft and Lanham Act claims.  Mr. Chism has also represented clients in administrative proceedings before the U.S. Patent and Trademark Office, including Ex Parte and Inter partes Reexaminations, as well as multiple Inter partes Reviews under the America Invents Act (AIA).

Mr. Chism served five years as a patent examiner with the United States Patent and Trademark Office (USPTO). As a primary examiner in the USPTO Biotechnology Group, he prosecuted U.S. and international patent applications to pharmaceuticals and methods of treatment, pesticides and herbicides, while focusing in the areas of small peptides and proteins, enzymes and plant extracts. 

Mr. Chism has extensive laboratory research in the areas of medical entomology concerning toxicological control of disease vectors for malaria, Eastern Equine Encephalitis, LaCrosse Encephalitis and West Nile virus.  




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Bar Admissions

  • United States Patent and Trademark Office
  • District of Columbia
  • Virginia
  • United States Court of Appeals, Federal Circuit



  • George Mason University School of Law, J.D., 2008
  • North Carolina State University, M.S., Entomology, 2001
  • Virginia Commonwealth University, B.S. cum laude, Biology, 1998

Contact Address

1200 New Hampshire Avenue NW, Suite 710

Washington, DC 20036-6802

Phone: 202.517.1888

Fax: 202.517.6322