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J A Kemp

Work 020 3077 8600
Fax 020 7430 1000
Cambridge, London, Munich, Oxford, Paris

Celia Keen

Work 020 3077 8600
J A Kemp

Work Department

Chemistry and pharmaceuticals


Partner, Head of the Chemistry and Pharmaceuticals Group, European Patent Attorney, UK Chartered Patent Attorney


Celia is Head of the Chemistry and Pharmaceuticals Group. She has over 25 years' professional experience in drafting and prosecuting patent applications, acting in oppositions and appeals before the European Patent Office for either the Patentee or the Opponent, and advising clients on patent strategy and portfolio management. She has particular experience in coordinating and handling the filing and prosecution of extensive series of patent applications worldwide and has assisted in the defence of a client's patent in litigation in Russia.

Celia's professional practice spans a wide range of chemical technologies, focusing in particular on the pharmaceutical field, where her work includes small molecule medicinal chemistry, medical use inventions, combination therapies and pharmaceutical formulations. She also handles cases on chemical processing, general organic and inorganic chemistry, health foods/nutraceuticals derived from plants and their related medical uses, agrochemicals, and oilfield technology.

Celia has a diverse client base which includes SMEs, universities and large corporations. Her major clients are based in the UK and the USA although she also handles work for companies and organisations in Australia, Canada, Continental Europe and Russia.

Celia joined J A Kemp in 1986 and became a partner in 1997.




Fellow of the Chartered Institute of Patent Attorneys (CIPA), Member of the Institute of Professional Representatives before the European Patent Office (EPI), Member of the International Federation of Intellectual Property Attorneys (FICPI), Member of the American Intellectual Property Law Association (AIPLA)


University of Oxford, Masters Degree in Chemistry, including research into the synthesis and structure determination of novel transition metal complexes

London: TMT (technology, media and telecoms)

PATMA: Patent attorneys

Within: PATMA: Patent attorneys

J A Kemp is 'extremely meticulous in fully understanding the business context, strategies and needs' of its clients, which include NBCUniversal, University of Vienna and Pharma UK. Celia Keen is head of the chemistry and pharmaceuticals team and has extensive experience in drafting and prosecuting patents. The 'excellent' Mark Roberts is 'very knowledgeable about European patent prosecution' and 'offers prompt and appropriate advice'. Other key team members are Patrick Campbell, Kieron Grehan, Andrew Webb, and Simon Wright, who are all 'excellent lawyers'. Key mandates included Chris Milton advising Semblant on the management of its patent portfolio and Amanda Simons assisting F2G with the drafting and prosecution of its new patent applications. Other recommended individuals include Ravi Srinivasan, John Leeming, Andrew Bentham, Sarah Roques, and Graham Lewis.

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