George E. Quillin is a partner and intellectual property lawyer with Foley & Lardner LLP. George litigates patent interferences and patent appeals, and counsels clients in patent prosecution. He is chair of the Patent Office Trials Practice and is a member of the firm’s IP Litigation, Mechanical & Electromechanical Technologies and Appellate Practices. He represented Greene’s Energy in Oil States Energy Services, LLC v. Greene’s Energy Group, LLC, 138 S. Ct. 1365 (2018).


In recognition of his experience, George has been Peer Review Rated as AV® Preeminent™, the highest performance rating in Martindale-Hubbell's peer review rating system. He was also recognized for post-grant procedures (2012-2013, 2015-2018) and for prosecution (2014) among IAM Patent 1000 – The World’s Leading Patent Practitioners. In 2016, George was recognized by The Legal 500 for his work in patent prosecution.


George is a graduate of the U.S. Military Academy (B.S., 1973) and served with the Army (in the 82d Airborne Division, as well as in Germany) prior to attending law school. He received his law degree in 1984 from the University of South Carolina, where he took American Jurisprudence Awards (top honors in his class) in fiduciary administration, property, and trusts & estates. George was a member and then team captain of the University of South Carolina College of Law National Moot Court Team (1983-1984).

Following law school, George was selected for a two-term federal judicial clerkship, serving the Honorable Jean Galloway Bissell, Circuit Judge, U.S. Court of Appeals for the Federal Circuit (1984-1986). For most of the 1990s, George was an adjunct professor at the George Mason University Law School, teaching patent prosecution.

Admissions and Professional Memberships

George is admitted to practice in South Carolina and the District of Columbia, before the United States Supreme Court and the U.S. Court of Appeals for the Federal Circuit, and before the U.S. Patent and Trademark Office. He is a member of the South Carolina, District of Columbia, and Federal Circuit Bar Associations; and the Christian Legal Society.

Representative Matters

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Represented all defendants in a patent infringement case in Delaware concerning synthetic renewable diesel fuels. In addition, our client filed an inter partes reexamination proceeding and inter partes review proceeding with respect to two separate patents, including the '094 patent at issue in the 2nd DE suit. Syntroleum also filed an additional IPR on a 3rd related Neste patent, which is pending.
Represented the petitioner, Idle Free, in an inter partes review involving a patent directed to an air conditioning system for vehicles, such as long-haul trucks. Idle Free’s petition was granted by the PTAB after the Board made a preliminary finding that all of the claims of the patent were unpatentable. Following the PTAB’s decision to institute the inter partes review, the Northern District of Illinois granted Idle Free’s motion to stay the parallel litigation. Following the Board’s decision to institute trial on all claims of the patent, the patent owner conceded that the claims being asserted in the district court were invalid. Thus, the inter partes review was limited to the remaining claims of the patent. The PTAB then issued a decision regarding the inter partes review stating that all the claims were canceled and the motion to amend was denied.
Represented the senior party patentee, Idemitsu Kosan Co., Ltd., in two interferences before the USPTO. Each interference was based on a different application owned by a competitor. The USPTO ruled in favor of Idemitsu Kosan in both interferences.