Michael S. Marcus


Michael S. Marcus focuses his practice on infringement, validity, and right to use opinions in the chemical and industrial bioscience technologies to assist clients with launching and sustaining new or existing products and processes. Michael also counsels clients on all aspects of IP strategy, including patent prosecution matters with an emphasis on reexamination and reissue.

Prior to joining private legal practice, he was a legal adviser with the Office of the Assistant Commissioner for Patents, focusing on reexamination and petition procedures, and a primary examiner in the chemical and biotechnology groups of the U.S. Patent and Trademark Office for more than 15 years.


2020, listed in Capital Pro Bono Honor Roll



  • American Chemical Society
Professional Activities

Michael has been a member of the American Chemical Society since 1973.



  • District of Columbia
  • New York
  • Supreme Court of Virginia
  • U.S. District Court - District of Columbia
  • U.S. District Court - Eastern District of Virginia
  • U.S. Patent and Trademark Office
  • United States Court of Appeals for the Federal Circuit
  • United States Court of Appeals for the Fourth Circuit
  • Virginia


  • City College of New York, BS
  • George Mason University School of Law, JD