Areas of Practice
  • Mandarin
  • Cantonese
  • Malay
  • Rutgers University School of Law, J.D., 2010
  • University of Medicine and Dentistry of New Jersey, Ph.D., Pathology and Immunology, 2000
  • Upsala College, B.S., Biology and Biochemistry, summa cum laude, co-valedictorian, 1995
Bar & Court Admissions
  • New York
  • New Jersey
  • US District Court for the Eastern District of New York
  • US District Court for the Southern District of New York
  • US Patent and Trademark Office

Siew Yen Chong, Ph.D.

1114 Avenue of the Americas
New York NY 10036
TEL: +1 212 378-7541
FAX: +1 212 506 3950

Siew Yen Chong, Ph.D., is an associate in Steptoe’s New York office, where she is a member of the Intellectual Property Group.

Dr. Chong’s practice focuses on the field of biologics litigation, as well as pre-litigation strategy counseling and freedom to operate analyses concerning application of the Biologics Act to biotherapeutic development programs.  Her experience has included small-molecule patent litigation (Hatch-Waxman), pre-suit investigations, opinions of counsel, IP due diligence, post-grant proceedings before the US Patent and Trademark Office, and domestic and foreign patent prosecution.  Some of the technologies she has worked with include monoclonal antibodies, HIV antivirals, DNA sequencing, and other aspects of the life sciences.

Prior to her legal career, Dr. Chong was a scientist at a multinational pharmaceutical company, where she focused on the development of candidate vaccines targeted to bacterial and viral diseases.  She is experienced in the design of immunogenicity and in vivo challenge studies, and development of animal models for the evaluation of pre-clinical candidate vaccines.

Representative Matters

  • Representing pharmaceutical companies in litigation regarding anti-PCSK9 monoclonal antibody patents relating to lowering LDL cholesterol
  • Represented pharmaceutical companies in conducting due diligence in the acquisition of therapeutic monoclonal antibody patent estate
  • Represented international pharmaceutical companies in conducting pre-suit investigation and counseling regarding therapeutic monoclonal antibody patent relating to autoimmune diseases
  • Represented an international pharmaceutical company in Hatch-Waxman litigations regarding nucleotide analog patents covering Atripla® and Truvada® used in the treatment of HIV infection
  • Represented a university in a District Court litigation and post-grant proceedings at the PTAB and Appellate Court regarding DNA sequencing patents
  • Represented a multinational life sciences company in conducting freedom to operate analyses concerning life sciences laboratory reagents and kits


  • New York Super Lawyers "Rising Star," Intellectual Property
    Litigation, 2015-2017

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