Eric Zylstra, Ph.D., is an associate whose practice focuses on patent prosecution and counseling, including opinion writing, due diligence, and patent portfolio strategy, working primarily in the chemical and pharmaceutical sciences. His technology experience includes small molecules, pharmaceutical and agricultural formulations, dyes, and fuel cells. Before joining the firm as a student associate, he worked as a technical advisor, patent agent, and student associate at Townsend and Townsend and Crew.

Dr. Zylstra’s technical experience includes total synthesis of natural products, organic methodology, solid-and solution-phase parallel synthesis and polymer chemistry. He was a senior scientist at Discovery Partners International (previously known as ChemRx and Axys Advanced Technologies) where his area of research was synthetic and medicinal chemistry for early-stage drug discovery. He was also a postdoctoral research scientist for the Pharmaceutical Science Department at the University of Tokyo, where his area of research was total synthesis of natural products.

Professional & Community Activities

American Chemical Society, Member (1992-Present)

American Association of Intellectual Property Law, Member (2009-Present)


  • University of San Francisco School of Law, J.D.
    magna cum laude, Certificate in Intellectual Property with Honors
  • University of California, Berkeley, Ph.D., Synthetic Chemistry
  • Massachusetts Institute of Technology, S.B.
    Double Major in Chemistry and Literature

Bar Admissions

  • California (2013)


  • U.S. Patent and Trademark Office (2007)

Who We Are

Suite 600, 2175 North California Boulevard
Walnut Creek, CA, 94596
t +1 925.472.6333
f +1 925.407.8323

Eric J. Zylstra Ph.D.

Experience Highlights

Patent reexamination for Prometheus Laboratories Inc.
Represented Prometheus Laboratories, Inc. owner of an Orange Book listed branded drug, Lotronex (alosetron hydrochloride), indicated for women with more