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Ling Du

Fax +1.312.827.8000
Ling Du, Ph.D, is a registered patent attorney in the firm’s Chicago office. She focuses her practice on patent prosecution, patent litigation, and analysis and preparation of opinions regarding freedom to operate, patentability, design around patents, and patent infringement and validity. She counsels clients on patent portfolio management and strategy, patent licensing, and negotiation and drafting of various business documents including confidentiality and nondisclosure agreements. She also assists clients in all phases of post-grant proceedings at the Patent Trial and Appeal Board (PTAB). Additionally, she assists clients in filing trademark and copyright applications.

Dr. Du’s primary areas of technical expertise include polymers, tire and rubber arts, fuel cells, batteries, pharmaceuticals, material science, chemistry, nanotechnology, biotechnology, medical devices, semiconductor materials, and mechanical engineering.

Professional Background

Dr. Du previously served at the firm as a summer associate where she focused on diligence work, patent prosecution and litigation, and legal research.
During law school, Dr. Du worked as a law clerk at an IP boutique firm focusing on diligence work for pharmaceutical companies, such as early market opportunities, matters related to drug approval, development of Abbreviated New Drug Application (ANDA) strategies, and product launch management.

Prior to entering the legal field, Dr. Du worked as a senior research engineer at Goodyear Tire & Rubber Co. She was responsible for leading research projects in developing new materials, designing new formulations, assessing new compounding technologies, and commercializing new products.

Dr. Du has conducted research project in proton exchange membrane fuel cells in her Ph.D program.

Additional Information


  • Sadhan C. Jana, Ling Du, " Highly Filled Graphite-Polymer Composites: Synthesis, Processing and Characterization." in Graphite, Graphene, and Their Polymer Nanocomposites, Prithu Mukhopadhyay and Rakesh K. Gupta (Ed.), CRC Press, Taylor & Francis Group, 2013.


  • Ling Du, Ralf Mruk, Leena Nebhani, US 10005896, Rubber comprised of product of diene-based elastomer, branched PEI oligomer and reinforcing filler, and tire with component, 06/26/2018
  • Ling Du, US 9758651, Rubber composition and pneumatic tire, 09/12/2017
  • Ling Du, Xiaoping Yang, Carl T. R. Pulford, US 9757983, Tire with rubber component comprised of precipicated silica and functionalized graphene, 09/12/2017
  • Ling Du, David A. Benko, Paul H. Sandstrom, US 9574066, Rubber composition containing algae oil and tire with component, 02/21/2017
  • Ling Du, Xiaoping Yang, Carl T.R. Pulford, US 9162530 B2, Tire with rubber tread containing precipitated silica and functionalized carbon nanotubes, 10/20/2015.
  • Ling Du, Ralf Mruk, Annette Lechtenboehmer, Klaus Unseld, Claude E. F. Boes, Federic G.A. Siffer, Robert Roskamp, Leena Nebhani, US 9090757 B2, Preparation of Rubber Reinforced with at Least One of Graphene and Carbon Nanotubes with Specialized Coupling Agent and Tire with Component, 07/28/2015.
  • Ling Du, Xiaoping Yang, Carl T. R. Pulford, US9090756 B2, Tire with Component Comprised of Rubber Composition Containing Silica and Graphene Platelet Reinforcement, 07/28/2015.
  • Ling Du, Ralf Mruk, Leena Nebhani, William P. Francik, Tang H. Wong, US 9045627 B2, Rubber Composition and Pneumatic Tire, 06/02/2015
  • Kuo-Chih Hua, Ling Du, US 8415426 B1, Tire with rubber component containing combination of carbon black, silica and functionalized mineral, 04/09/2013
  • Kuo-Chih Hua, Ling Du, EP2607421 A3, Tire with rubber component containing combination of carbon black, silica and functionalized mineral, 08/07/2013

Technical Publications

  • Jeffrey R. Potts, Om Shankar, Shanthi Murali, Ling Du, Rodney S. Ruoff, Latex and two-roll mill processing of thermally-exfoliated graphite oxide/natural rubber nanocomposites, Composites Science and Technology 74 (2013) 166–172 (104 citations)
  • Jeffrey R. Potts, Om Shankar, Ling Du, Rodney S. Ruoff, Processing−Morphology −Property Relationships and Composite Theory Analysis of Reduced Graphene Oxide/Natural Rubber Nanocomposites, Macromolecules 45 (2012) 6045−6055 (232 citations)
  • Ling Du, Sadhan. C. Jana, Highly Conductive Epoxy/Graphite Composites for Bipolar Plates in Proton Exchange Membrane fuel cells, J. Power Sources 172 (2007) 734-741 (126 citations)
  • Ling Du, Sadhan. C. Jana, Hygrothermal Effects on Properties of Highly Conductive Epoxy/ Graphite Composites for Appl. as Bipolar Plates, J. Power Sources 182 (2008) 223-229 (32 citations)
  • Ling Du, Highly Conductive Epoxy/Expanded Graphite Polymer Composite Bipolar Plates in Proton Exchange Membrane (PEM) Fuel Cells, Univ. of Akron, Ph.D Dissertation, 2008 (14 citations)