Yichen Cao, J.D./Ph.D. | Partner


Email: yichencao@archlakelaw.com

Phone: 630-386-5514

Fax: 312-614-1873


Chicago-Kent College of Law (J.D., 2016)

University of Kentucky (Ph.D., 2008)

Pharmaceutical Sciences


University of Kentucky (Ph.D. Candidate in Organic Chemistry, 1999-2000)

Beijing (Peking) University (B.S., 1998)

Science in Chemistry


Bar and Court Admissions


Washington D.C. (Petition Pending)

U.S. Patent and Trademark Office




Yichen Cao is a patent attorney specializing in the acquisition and protection of intellectual property (IP) rights. Yichen's practice focuses on all aspects of patent law in the fields of chemicals, pharmaceutical, biological, chemical engineering, nutritional, and food sciences. 


Yichen's specialties include patent preparation and prosecution, patent litigation, preparation of legal opinions, patent portfolio management, developing IP strategy, and client counseling. Additionally, Yichen has participated in various stages of Hatch-Waxman Pharmaceutical cases and IPR proceedings. He has prepared expert reports and worked with experts to develop theories for use in litigation and IPR proceedings. Yichen works closely with clients developing strategies of IPR and litigation matters. 

Work Experience 

  • Arch & Lake LLP, Partner, Chicago, IL, (Jul. 2020 to Now)

  • Foley Hoag LLP, Associate, Boston, MA, (Aug. 2019 – Jul. 2020)

  • Arent Fox LLP, Associate, Washington D.C., (Sep. 2018 – Aug. 2019)

  • Amin Talati & Upadhye LLP, Patent Attorney/Patent Agent, Chicago, IL, (Jun. 2015 - Sep. 2018)

  • Rakoczy Molino Mazzochi Siwik LLP, Technical Advisor, Chicago, IL, (Sep. 2008 - May 2015)

  • Coldstream Laboratories, Inc., Scientist, Lexington, KY (Feb. 2008 – Aug. 2008)

  • College of Pharmacy, University of Kentucky, Research Assistant, Lexington, KY (2000 – 2008)

  • Abbott Laboratories, Summer Intern, Lake Bluff, IL (2001)

  • Department of Chemistry, University of Kentucky, Research Assistant, Lexington, KY (1999 – 2000)


  • Y. Cao, T.-X. Xiang, and B. D. Anderson, Development of Structure-Lipid Bilayer Permeability Relationships for Small Organic Molecules and Peptides, 5(3) Molecular Pharmaceutics 371-388 (2008).

  • S. S. Rane, Y. Cao, and B. D. Anderson, Quantitative Solubility Relationships and the Effect of Water Uptake in Triglyceride/monoglyceride Microemulsions, 25(5) Pharmaceutical Research, 1158-1174 (2008).

  • Y. Cao, M. Marra, and B. D. Anderson, Predictive Relationships for the Effects of Triglyceride Ester Concentration and Water Uptake on Solubility and Partitioning of Small Molecules into Lipid Vehicles, 93(11) Journal of Pharmaceutical Sciences 2768-2779 (2004).

  • P. A. Koutentis, Y. Chen, Y. Cao, T. P. Best, M. E. Itkis, L. Beer, R. T. Oakley, A. W. Cordes, P. Brock, and R. C. Haddon, Perchlorophenalenyl Radical, 123 J. Am. Chem. Soc. 3864-3871 (2001).