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Celia Keen

Partner, European and UK Patent Attorney

Celia is a European and UK Patent Attorney based in our London office and Head of the Chemistry and Pharmaceuticals Group. Celia’s experience 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 has expertise in the area of health foods and nutraceuticals derived from plants and their related uses in medicine.

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

Celia’s work includes drafting and prosecuting patent applications. She has particular experience in managing global patent strategies and in coordinating and handling the filing and prosecution of extensive series of patent applications worldwide. Celia also acts in oppositions and appeals before the European Patent Office. She has advised on the defence of a client’s patent in litigation in Russia.

Celia joined J A Kemp in 1986 and became a partner in 1997. She is recommended by The Legal 500.




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

Professional Qualifications

European Patent Attorney; UK Chartered Patent Attorney

Membership of Professional Bodies

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)



Tel: +44 20 3077 8600

80 Turnmill St,

Contact Celia

If you wish to talk to Celia Keen, please send an email directly to

or call +44 20 3077 8600

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