William’s biochemistry background has provided strong footing for his burgeoning practice in biotechnological patents, where he has particular experience of litigating technically complex major patent disputes.
Chambers and Partners (2018) say he is an “Able and experienced junior who elicits praise from instructing solicitors for his work ethic, written submissions and advice.” and that “He has a phenomenal brain.”
Patents & SPCs
- Regeneron Pharmaceuticals Ltd v Kymab Limited  EWCA Civ 1186 (and High Court first instance decision  EWHC 87 (Pat)): A complex patent dispute concerning transgenic mice for the production of fully human antibodies, pending application to the Supreme Court for permission.
- Eli Lilly and Co v Genentech  EWHC 3114 (Pat): Patent dispute about antibodies to IL-17 A/F, coming to trial in January 2019, with substantial jurisdictional interim disputes heard (see citation above) and under appeal, and a separate SPC claim about Article 3(a), and the “third party MA” issue.
- Takeda v Hoffman-L Roche AG  EWHC 2155 (Ch): Patent action concerning glycosylated antibodies with reduced ADCC, coming to trial in July 2019 (citation to CMC judgment).
- Sandoz v Searle  EWCA Civ 49 (and first instance decision  EWHC 987 (Pat)) : SPC dispute concerning the proper interpretation of Article 3(a) in the context of Markush claims – going to the CJEU on a reference.
- Accord v RCT  EWHC 569 (Pat): High Court trial concerning the small molecule anti-epileptic drug lacosamide, with experts on scientific and US law issues – currently under appeal.
- Abraxis v Comptroller General  EWHC 14 (Pat): SPC action brought against a refusal by the comptroller – reference made to the CJEU.
- GSK v Wyeth Holdings  EWHC 91 (Pat): High Court patent action relating to meningococcal vaccines.
- Idenix Pharmaceuticals v Gilead Sciences  EWCA Civ 1089 (and first instance decision  EWHC 3916 (Pat)): Substantial and complex patent dispute concerning broad Markush formula claims encompassing the HIV drug sofosbuvir, also involving experts of US law on priority issues.
- Teva v Actavis  EWHC 2604 (Pat) /  EWHC 2605: Disputed interim injunction application for infringement of patent to rasagiline citrate.
IT & Telecoms Disputes
- Unwired Planet v Huawei Technologies (Case D – settled): Complex telecoms dispute concerning the use of Hadamard codes for mobile telephone – base station syncing. Settled shortly before trial.
- Telecoms dispute, settled before issue after substantial involvement, concerning down-conversion techniques in radio signal reception.
- Education & awards
- Combined Undergraduate and Masters in Biochemistry (Molecular and Cellular Biochemistry) from Oxford University (2010), (First Class)
- Graduate Diploma in Law from City University London (2011), (Commendation)
- Bar Professional Training Course from the Inns of Court School of Law, City University London (2012), (Outstanding)
- Eric Newsholme Prize for Biochemistry
- Fowler Prize for excellence in college examinations
- Professional memberships
- Intellectual Property Bar Association (IPBA)
- Chancery Bar Association (ChBA)
- Gray’s Inn
- Hobbies & interests
Loves cooking and home brewing (beer), keen badminton player.
Contact William Duncan's clerks
Whilst barristers have a designated practice management team, all the clerks have the capacity and knowledge to assist in cases involving all counsel.