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D Young & Co LLP

Work 023 8071 9500
Fax 023 8071 9800
London, Munich, Southampton

Garreth Duncan

Work 023 8071 9500
D Young & Co LLP

Work Department



Garreth’s experience in the patent profession, both in private practice and as an in-house attorney in Pfizer’s European patent department, have focused strongly on pharmaceutical patents.

Garreth’s technical expertise covers all types of chemical subject matter including food chemistry, petrochemicals, agricultural chemistry, polymer chemistry and chemical syntheses and processes. In the pharmaceuticals sector, Garreth handles patent applications for new active substances, formulations, combination therapies, new medical indications, and manufacturing processes.

He has particular expertise in obtaining supplementary protection certificates (SPCs) and other forms of patent term extension, advising clients on SPC strategies and filing and prosecuting SPC portfolios throughout Europe on a number of important marketed pharmaceutical and plant protection products.


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.

European patent attorney 2002; chartered patent attorney 2005; chartered chemist; partner at D Young & Co 2011.


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


St Anne’s College, University of Cambridge (MChem in Chemistry); Research project on free-radical routes to novel alkaloids; Queen Mary College, University of London (Certificate in Intellectual Property Law).

London: TMT (technology, media and telecoms)

PATMA: Patent attorneys

Within: PATMA: Patent attorneys

D Young & Co LLP has a team of talented patent attorneys who possess 'strong technical expertise' and the 'level of service is exceptional'. Engineering, aerospace and medical devices expert Anthony Albutt is a key figure and worked with Fokker Aerostructures on patent drafting and prosecution. Zöe Clyde-Watson regularly conducts due diligence on patent portfolios and has additional expertise in drafting and prosecution. Garreth Duncan specialises in life sciences and is notably strong in obtaining supplementary protection certificates. Pharmaceuticals and nutrition are two key areas of interest for Kirk Gallagher, who is skilled in drafting, filing and prosecution. Catherine Mallalieu assisted cell and gene therapy specialists Oxford BioMedica with patent licensing issues. Charles Harding and Jonathan Jackson both focus on contentious matters, with Harding particularly well known for EPO oppositions and appeals, and Jackson specialising in the telecoms sector. David Meldrum, Simon O’Brien and Aylsa Williams are also recommended.

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