Carl applies his scientific and legal training toward acquiring, protecting and managing patent rights for clients in the biotechnology, chemistry, pharmaceutical and medical device industries.

Carl has particular expertise in developing and prosecuting patent portfolios for FDA-approved or soon-to-be approved drug products, including for products involved or expected to be involved in litigation. He also devises and executes strategies to secure second and third generation patent coverage that extends pharmaceutical product exclusivity (e.g., formulation, dosing regimens and impurity profiles). FDA-approved drug products on which Carl has worked include Ibrance®, OxyContin®, Targiniq®, Fasenra™, Epanova®, Sitavig®, Oravig®, Bosulif®, Zetia® and Vytorin®.

Carl has prepared and prosecuted patent applications in the U.S. Patent and Trademark Office and numerous foreign patent offices. His practice also includes pre-litigation case assessments; preparing patentability, validity, infringement and enforcement opinions; and due diligence evaluations. He is experienced in post-grant patent proceedings when product-critical patents are at stake, such as reissues, reexaminations and European oppositions. Carl has also prepared numerous patent term adjustment petitions and patent term extension applications and conducted Orange Book listing investigations.

Prior to joining Fenwick, Carl was a partner in a leading international law firm. He previously also represented pharmaceutical clients in patent infringement litigation, particularly matters arising under the Hatch-Waxman Act.

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  • Representative Transactions*
    • Royalty Pharma in its $450M investment in Cytokinetics Inc. based on the drug products aficamten and omecamtive mecarbil
    • Royalty Pharma on IP diligence in its $2.025B strategic funding partnership as part of MorphoSys' $1.7B acquisition of Constellation Pharmaceuticals
    • Royalty Pharma in its $342M acquisition of the royalty interest in the cabozantinib products Cabometyx and Cometriq from GlaxoSmithKline (GSK)
    • Royalty Pharma in IP diligence for its $155M acquisition of royalty interest in the drug product seltorexant from Minerva Neuroscience
    • Royalty Pharma in its $575M acquisition of the residual royalty interest in Vertex Pharmaceuticals, Inc.’s cystic fibrosis treatments owned by the Cystic Fibrosis Foundation
    • Royalty Pharma in its $650M royalty purchase agreement with PTC Therapeutics, Inc. to acquire a portion of PTC’s royalty interest in Risdiplam
    • Royalty Pharma in its $255M acquisition from Agios Pharmaceuticals, Inc., of sales-based royalty rights on worldwide net sales of Bristol Myers Squibb’s IDHIFA® (enasidenib)
    • Royalty Pharma in its $220M acquisition of AiCuris Anti-infective Cures GmbH’s partial royalty interest in Prevymis™ (letermovir)
    • Royalty Pharma in its $94M acquisition of Massachusetts General Hospital’s royalty interest in Entyvio (vedolizumab)
    • Royalty Pharma in its $330M acquisition of Eisai Co., Ltd.’s royalties on sales of Epizyme Inc.’s soon-to-be-FDA-approved drug tazemetostat
    • Royalty Pharma in its $100M equity investment (with options to invest up to an additional $100M) in Epizyme Inc.
    • Royalty Pharma in its $827M acquisition of Ligand Pharmaceuticals’ royalties on sales of Promacta

    * Includes experience from a prior firm

  • Speaking Engagements
    • “Original Sin: How Origination Credit Is a Barrier to Diversity Goals,” Office for Diversity & Inclusion of the New York City Bar Association, October 2020 (Speaker)
    • "Keys to Maximizing U.S. Patent Term,” China Pharma IP Summit 2019, October 2019 (Speaker)
    • “Counteracting the flux of patent eligibility,” Managing Intellectual Property U.S. Patent Forum 2019, April 2019 (Speaker, panel)
    • “Identifying Patent Examiner Biases and Making Them Work Using Legal Analytics,” Legal Analytics and the Business of Law Summit, November 2014 (Speaker, panel)

Education & Admissions

Ph.D., Synthetic Organic Chemistry, Harvard University

J.D., New York University School of Law

M.S., Physical Organic Chemistry, Carnegie Mellon University

A.M., Organic Chemistry, Harvard University

B.S., Chemistry, Economics and Business, Carnegie Mellon University

Admitted to practice in New York and Massachusetts

Admitted to practice before the United States District Court for the Southern District of New York, the United States Patent and Trademark Office (USPTO) and the United States District Court for the Eastern District of New York


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