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Garreth Duncan

Partner, Patent Attorney / Southampton

Garreth Duncan

Practice area

Patents - biotechnology, chemistry & pharmaceuticals group


Garreth is experienced in all types of chemical subject matter, including pharmaceuticals, food chemistry, petrochemicals, agricultural chemistry, polymer chemistry and chemical synthesis and processes. He has particular experience in obtaining Supplementary Protection Certificates and other forms of patent term extension.

Garreth acts for a wide spectrum of clients, ranging from large multinational companies to universities and associated spin-out companies.

Prior to joining D Young & Co in 2007 Garreth worked both in private practice and in Pfizer’s European Patent Department. Garreth’s responsibilities at Pfizer included drafting and prosecuting pharmaceutical patent applications worldwide, providing validity and freedom-to-operate opinions and advising on a range of intellectual property matters. His experience there included a secondment to the Pfizer site in Ann Arbor, US.

Garreth became a partner at D Young & Co in 2011.


A "key player" "on the biotechnology, chemistry and pharmaceuticals side" Legal 500.

Garreth is ranked as an IP Star for 2016 by Managing IP.

"Garreth Duncan's stint at Pfizer has endowed him with first-hand insight into the pharmaceutical sector – and in particular the commercial importance of SPCs and how best to obtain them." IAM Patent 1000.


MChem in Chemistry, St Anne’s College, University of Oxford. Research project on free-radical routes to novel alkaloids.
Certificate in Intellectual Property Law, Queen Mary College, University of London.
European Patent Attorney 2002.
Chartered Patent Attorney 2005.
Chartered Chemist.
European Design Attorney. 


Chartered Institute of Patent Attorneys (CIPA).
European Patent Institute (epi).
Royal Society of Chemistry (RSC).

View Garreth's profile and recommendations on LinkedIn


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