Celia Keen

Partner, Patent Attorney

Celia is Head of the Chemistry and Pharmaceuticals Group. She has over 30 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. The Legal 500 identifies Celia as a “recommended individual”.

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




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)

Contact Celia

If you wish to talk to Celia Keen, please send an email directly to ckeen@jakemp.com

or call +44 20 3077 8600

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