Dorothy R. Auth Ph.D. 

Partner – New York
T.+1 212 504 6018
200 Liberty Street
New York, NY 10281 V-CARD

Dr. Dorothy Auth has more than 20 years of experience in complex patent litigation, as well as licensing, patent procurement, and intellectual property counseling in the United States and abroad. Her experience spans diverse industries, including biotechnology, pharmaceutical, and medical devices, as well as consumer products, computers, and other mechanical devices.

She addresses intellectual property diligence issues surrounding mergers, acquisitions, and bankruptcies. Representative clients in transactional IP matters includes the U.S. Treasury; Salix Pharmaceuticals, Ltd.; Pfizer; Elan Pharmaceutical; Healthcare Royalty Partners; Fountanbleu Hotel; Quart Rx Pharma; iShares; Towers Watson; Hess and Triarco. In the transactional area, Dorothy advises clients on the validity of target patents and performs clearance analysis on the patents of competitors to render freedom-to-operate opinions.

Dorothy also litigates in U.S. Federal Courts and in international arbitrations conducted under the WIPO rules. She conducts all aspects of litigation, including motion practice, expert preparation and all aspects of discovery practice. Representative litigation clients include Medinol, DuPont, Osteonics and Kanzaki.

Dorothy also coordinates global patent procurement and enforcement strategies for her clients to maximize their patent-protected field. In this area, Dorothy’s practice includes U.S. and international client counseling and opinions regarding IP matters. Her international experience includes coordinating patent infringement trials and hearings between the U.S. and different European jurisdictions including trials seeking preliminary relief and cross-border injunctions, as well as nullity, cancellation and oppositions proceedings on patent rights.

Among the clients Dorothy has counseled are Credit Suisse, Rhone-Poulenc Rohrer, Inc., BioRest Ltd., Oscillon Ltd., Digene Corporation, Hoffmann-La Roche, and the National Institutes of Health.

At the firm, Dorothy is a member of the Technology Committee, the Healthcare Industry Team and the Advisory Counsel for the firm’s Center for Career Advancement. Dorothy was the Partner Chair of the Women’s Leadership Initiative for over five years.

Dorothy is the current President of the New York Intellectual Property Law Association. She is also a member of the American Intellectual Property Association and the Intellectual Property Owner's Association. Dorothy has been listed as an "IP Star" in the 2017-2020 editions of Managing Intellectual Property magazine, the guide to the world's leading IP law firms and practitioners.

Dorothy is a frequent speaker on a wide variety of topics, including:

  • Avoiding Patent Exhaustion: Structuring Agreements in View of the Latest Jurisprudence
  • Update in Reverse Payment Settlements After Actavis
  • Post Grant Review and Inter Partes Proceedings
  • Annual Update in Biotech/Pharma Patent Law – PLI
  • Patent Eligibility under § 101 for Biotechnology

Prior to joining Cadwalader, she was a partner with Morgan & Finnegan, an intellectual property specialty firm in New York.

Dorothy earned her J.D. from St. John's School of Law, a Ph.D. in biochemistry from Tufts Medical School, and her B.A. in biochemistry from Cook College of Rutgers University.

Dorothy is admitted to practice in New York and New Jersey and before the U.S. District Courts for the Southern and Eastern Districts of New York and the District of New Jersey, and the U.S. Courts of Appeals for the Second and Federal Circuits. She is also licensed to practice before the U.S. Patent and Trademark Office.

Orca Health, Inc. v. 3D4Medical Ltd., et al. (D. Utah) (Settled Prior to Filing Answer)
3D4Medical Ltd., et al. v. Orca Health, Inc. (S.D. Cal.) (Settled Prior to Filing Answer)
Represented 3D4Medical Ltd. in actions against Orca Health, Inc. In one action, she defended 3D4Medical in Utah Federal District Court where Orca Health alleged over 10 state and federal tort claims, including unfair competition, trade secret misappropriation, and infringement of its trademarks, trade dress and patents.  Before discovery began, we filed multiple motions to dismiss the complaint under rule 12(b)(6) as well as a motion to disqualify plaintiff’s counsel and to invalidate the asserted patents as being directed to ineligible subject matter.  In addition, we filed a separate lawsuit in the Southern California Federal District Court against Orca Health for copyright infringement, trade dress infringement, unfair competition and breach of obligations under its End User License Agreement with 3D4Medical.  After having already dismissed one of the two patents from case and just before the hearing on the Utah preliminary motions, a favorable settlement of both cases was reached.


News Releases

view more »


Dorothy R. Auth Ph.D. 


  • U.S. District Court, Southern District of New York
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Appeals, 2nd Circuit
  • U.S. District Court, Eastern District of New York
  • U.S. District Court, District of New Jersey
  • New Jersey
  • New York


  • St. John's University School of Law
    J.D., 1996
  • Tufts University
  • Rutgers University
    B.A., 1985



Cadwalader's research and intelligence platform provides analysis on changes in U.S. financial regulation. Subscribers receive a daily newsletter interpreting new laws, rules and enforcement actions that impact financial institutions.