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Peter J. Lish

(312) 775-8225

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Peter Lish joined McAndrews, Held & Malloy as a law clerk in 2007 and as a full time associate in 2009. While with the firm, Peter has gained experience in litigation and patent prosecution covering a variety of technological areas.  Peter currently concentrates on preparing patent applications and managing patent portfolios in a variety of technologies, particularly in the chemical, petrochemical, energy, and mechanical fields.  He also assists both large and small clients with freedom-to-operate, invalidity, and non-infringement opinions relating to utility and design patents.

Prior to law school, Peter worked as a patent examiner for the United States Patent and Trademark Office (USPTO). As part of Technology Center 1700, he reviewed patent applications related to chemical products and processes. Peter specialized in the examination of applications directed toward carbon nanotechnology. He also worked extensively in technologies relating to the development of catalysts and sorbents and their use in a multitude of chemical processes. Due to his experience, Peter was selected as a member of the small group responsible for creating the USPTO classification system directed toward nanotechnology. While with the USPTO, Peter was a member of the U.S. Patent and Trademark Office Society.  He also was a regular participant in the Atlantic Nanotechnology Forum, a series of monthly lectures on developments in nanotechnology, held in Alexandria, Va.

While in law school, Peter excelled in Intellectual Property courses such as Patent Law, Trademarks & Unfair Competition, IP Litigation, and Telecommunications & Internet Policy.  He also served as an Articles Editor for the Northwestern University Journal of Technology and Intellectual Property.

As an undergraduate studying chemical engineering, Peter completed extensive coursework in areas such as Chemical Reaction Engineering, Process Design and Materials Science.  He also gained laboratory experience in fields including organic and analytical chemistry.  In addition, Peter tutored students in argument formulation and persuasive writing techniques as a member of the University of Notre Dame Writing Center.

Related Experience

  • Legal Intern at the Roderick MacArthur Justice Center
  • Patent Examiner for the United States Patent and Trademark Office

Professional & Community Involvement

  • Past Member, U.S. Patent and Trademark Office Society

Areas of Practice


Bar Admissions / Registrations

  • Illinois
  • U.S. Patent and Trademark Office


  • Northwestern University School of Law, J.D., cum laude
  • University of Notre Dame, B.S., Chemical Engineering, cum laude