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Sidney Persley focuses his practice in the life sciences, biotechnology, pharmaceutical, and chemical areas. He advises clients on patent portfolio development, licensing, patent due diligence, strategy, and management. He has experience in patent preparation, prosecution, product clearance, patent validity and invalidity, patent appeals, patent legal opinions, and freedom to operate analysis. Sidney also has experience in IP litigation, foreign patent oppositions, inter partes proceedings, post-grant review proceedings, trademark registrations and cancellation proceedings along with FDA regulatory matters.

Previously, Sidney served as Chief Intellectual Property Counsel for a global chemical company. In this role, he led the negotiation and capture of multimillion-dollar strategic business deals and alliances involving licensing, joint ventures, collaborative business arrangements, distribution arrangements, research and product development, and commercial transactions involving mergers, acquisitions, sales, manufacturing, and marketing. He also developed and managed a strategic global IP management plan and managed IP litigation through outside counsel. His experience also includes patent attorney work for a major pharmaceutical company and major oil and gas company


  • Intellectual Property
  • Patent Prosecution
  • IP Litigation
  • Inter Partes Proceedings
  • Post-Grant Review proceedings
  • Licensing
  • Trademarks

The attorney is providing legal services through and affiliated with Greenberg Traurig, LLP, a New York Limited Liability Partnership. Prior results do not guarantee a similar outcome.



  • Served on Sun Chemical Corporation patent infringement litigation teams.°
  • Served on Sun Chemical Corporation patent invalidity litigation teams.°
  • Responsible for Avadim Corporation’s patent portfolio development in the human biome area.°
  • Sun Chemical Corporation Consultant for over 60 EPO Opposition & Appeal Proceedings.°

°The above representations were handled by Mr. Persley prior to his joining Greenberg Traurig, LLP.

  • Sun Chemical Corporation, 1996-2018
    • Chief Intellectual Property Counsel, 1998-2018
    • Patent Counsel, 1996-1998
  • Patent Attorney, Eli Lilly & Company, 1991-1994
  • Patent Attorney, Exxon Corporation, 1988-1991
  • Design Engineer, TXE Consulting
  • Process Design Engineer, Eli Lilly & Company
  • Process Engineer, Eli Lilly & Company
  • Technical Team Developing Synthetic Insulin Manufacturing Process, Eli Lilly & Company
  • Oil and Gas Refinery Engineer, Standard Oil of Indiana Corporation

Recognition & Leadership

  • Member, New Jersey Bar Association
  • Member, North Carolina State Bar Association
  • Member, Mecklenburg County Bar
  • Member, Carolina Patent, Trademark & Copyright Law Association
  • Member, American Intellectual Property Law Association
  • Member, American Bar Association


  • J.D., Texas Southern University Thurgood Marshall School of Law
  • B.S., Chemical Engineering, Purdue University
  • New Jersey
  • North Carolina
  • U.S. Patent and Trademark Office
  • Supreme Court of New Jersey
  • Supreme Court of North Carolina
  • U.S. District Court for the District of New Jersey
  • U.S. Court of Appeals for the Federal Circuit
Admitted in New Jersey and North Carolina. Not admitted in Texas.