Our Professionals


Kathleen Petrillo
| Partner
314.345.7005 Direct |
314.345.7600 Fax


University of Delaware
  • Provost Scholar
  • President's Achievement Scholarship
University of Pittsburgh
  • B.S., Chemical Engineering, 1987, cum laude
George Mason University; The John Marshall Law School
  • J.D., 1993, cum laude, Order of John Marshall

Areas of Focus

  • Chemical
  • Life Sciences & Pharmaceuticals
  • Litigation
  • PTAB Proceedings


Bar Information

  • Missouri, Admitted 1994
  • Illinois, Admitted 1993
  • United States Patent and Trademark Office, Admitted 1991

Awards and Recognitions

  • Missouri & Kansas Super Lawyer® (recognition given to the top 5 percent of lawyers per jurisdiction)
  • The Best Lawyers in America® - Patent Law and Patent Litigation (selection is by peer review)
  • Top 50 Women Missouri & Kansas Super Lawyers 2012
  • "Who's Who in Technology" - St. Louis Business Journal
Practice Groups
Chemical Patent Practice Group
Christine Emnett, Ph.D.
Paul Fleischut
Colleen Gray
Janet Hendrickson, Ph.D.
Morgan Johnson
Vincent Keil
Elizabeth Millard, Ph.D.
Kathleen Petrillo
John Roedel, Jr.
John Schroeder
Paul Tietz
Andrew Wegman
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