John Harrelson is a member of Flaster Greenberg’s Intellectual Property Department and Patent Practice Group. He has more than 20 years of experience in worldwide patent portfolio management, drafting, and prosecuting patent applications across various technical fields, including chemical, pharmaceutical, biotechnology, and nanotechnology.

He focuses his practice on assisting clients in the preparation and prosecution of patent applications, freedom to operate studies, due diligence, and intellectual property strategy in subject matters such as small molecule organic chemistry, polymer chemistry, biochemistry, apparel, textile fibers, industrial fibers, chemical process, alternate energy, fuel cells, batteries, nucleic acids, imaging agents, adhesives, inks/pigments, nanotechnology, organic light emitting diodes (OLEDs), metallic and organometallic catalysts, medical devices, consumer products, LEDs, magnets, computer chips, and display systems.

Prior to becoming an attorney, John developed an intimate understanding of a company's business as an in-house intellectual property manager and senior research chemist at DuPont.