Kathleen N. Ehrhard, Ph.D.


Worldwide Plaza
825 Eighth Ave., 31st Fl.
New York, NY 10019

Dr. Kathleen N. Ehrhard is experienced in the preparation and prosecution of domestic and international patent applications. She counsels clients on the development of their patent portfolios and provides guidance on product cycle management strategies for their technologies.

She has experience in the preparation and prosecution of patents in numerous areas of the life sciences, including biotechnology and pharmaceutical fields such as molecular and cellular biology, proteomics, vaccines, tissue implants, diagnostic and therapeutic methods and kits, transgenic animals, small molecules, and pharmaceutical formulations. She also has experience in the worldwide prosecution of patents in the industrial textiles field, including machine clothing and composite parts for the aerospace industry, as well as in fields such as composite blades used in the papermaking industry.

In addition to her passion for understanding the raw mechanics of science behind emerging products and ideas, Kathleen excels at interpreting the constantly changing landscape of regulation and law in order to best serve her clients. Her advice ultimately determines the way in which her clients pursue their patents, and she has seen numerous patent portfolios secured as a result of her counsel.

In addition to patent prosecution, Kathleen conducts and prepares freedom-to-operate, non-infringement, and invalidity analyses and opinions and focuses on transactional work that enables clients to develop and commercialize their technologies.

Ms. Ehrhard has been recognized as a New York Rising Star in 2017 and 2018. Super Lawyers is published by Thomson Reuters. Click here for their methodology. No aspect of this advertisement has been approved by the Supreme Court of New Jersey. 


Kathleen’s dissertation research focused on a novel method of detecting interactions between heterologous transmembrane and cytosolic or cell surface proteins by exploiting the G-protein signaling pathway in yeast. This work has been published in Nature Biotechnology, and she is a co-inventor on patents related to her dissertation research.


  • J.D., Fordham University School of Law, 2008
  • Ph.D., M.Phil., M.S., Yale University, Pharmacology, 2001
  • B.A., Wellesley College, Biological Chemistry, 1993

Bar Admissions

New York, U.S. Patent & Trademark Office