• 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


  • American Chemical Society


  • George Mason University School of Law, JD
  • City College of New York, BS
Download V-Card

Michael S. Marcus


Washington, DC v. +1.202.420.3702 f. +1.202.420.2201

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. Mr. Marcus 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, specializing in 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.


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