Geoffrey Zelley

Partner Wilmington
Phone: (302) 467-4252


Geoffrey Zelley represents clients in the biotech and chemical fields in patent preparation and prosecution in the United States and abroad. His representation includes counseling and opinions, both as to potential validity/invalidity, or freedom to operate/noninfringement. He additionally prepares and prosecutes cases in other areas of technology, including the mechanical and the electrical arts. He manages a large docket of ongoing patent matters, providing suggestions tailored to obtain the broadest possible patent protection while avoiding unnecessary costs.

Geoffrey also has several years' experience in intellectual property litigation, including copyright and trademark, but mostly in the patent field. He has represented both sides of standard patent infringement cases, as well as patent owners in ANDA litigations. Geoffrey’s work spans numerous areas of discovery, including e-discovery, document collection, review, production and witness preparation and also the defense of false marketing litigation. His representation has included chemical companies, consumer product companies, and pharmaceutical companies.

Prior to attending law school, Geoffrey was a Research Associate in the developing field of three dimensional printing. In particular, he provided research and development for the formulation of 3-D printed organic and inorganic scaffolds for use in tissue engineering.


  • Prosecutes and manages international patent portfolios in diverse industries such as chemicals, pharmaceuticals, consumer products and electronics.
  • Counsels major chemical and pharmaceutical companies as to freedom to operate and invalidity.
  • Oversaw acquisition and transfer of large international patent family.
  • Manages an active docket of several hundred patent applications while pro-actively working with examiners at the USPTO to streamline prosecution and avoid unnecessary expenses.


Bar Admissions

  • Delaware
  • New Jersey
  • U.S. Patent and Trademark Office


  • George Washington University Law School, J.D., 2006
  • University of Virginia, B.S., Chemical Engineering, 2001

Court Admissions

  • U.S. Court of Appeals, Federal Circuit
  • U.S. District Court, District of Delaware


  • American Intellectual Property Law Association (AIPLA)
  • American Bar Association
  • Delaware State Bar Association