Dr Marianne Privett > AA Thornton > London, England > Lawyer Profile

AA Thornton
Octagon Point
5 Cheapside
Marianne Privett photo

Work Department

Patents: Chemistry, biotechnology and pharmaceuticals


Marianne began her patent career in 2003 at Johnson Matthey. Whilst at Johnson Matthey, Marianne helped draft and prosecute patent applications relating to platinum-based anti-cancer
pharmaceutical products, opiate and opioid pharmaceutical products, pharmaceutical compositions and pharmaceutical manufacturing processes, and helped to manage global patent portfolios in a range of technical fields.

She moved into private practice in 2007 and has subsequently gained further experience in life sciences and biotechnology.

Marianne is a partner in our Chemistry, biotechnology and pharmaceuticals department. She also sits on the firm’s systems group, who is responsible for IT hardware and software, including the specialist IP software systems that support the smooth and efficient running of the firm.


  • Marianne began her patent career in 2003 at Johnson Matthey, a large speciality chemicals company
  • She began her career in private practice in 2007
  • She joined A.A. Thornton & Co. in 2010
  • She joined the EQE Examination Committee for Paper C in 2014
  • She was promoted to Senior Associate in July 2017
  • Marianne was promoted to Partner in September 2018


  • Fellow of the Chartered Institute of Patent Attorneys (CIPA)
  • Member of the European Patent Institute (EPI)


  • MChem and PhD Materials Chemistry, University of Southampton

Lawyer Rankings

London > TMT (technology, media and telecoms) > PATMA: Patent attorneys

AA Thornton ‘combines high-quality advice with the ability to listen and understand the specific needs and challenges of its clients’, ranging from multinational corporations to SMEs, individual investors and academic institutions, based across Europe, North America, India and the Far East. Noted for its capability in handling patent prosecution and opposition work at the EPO, the practice is also well-placed to leverage the expertise of the firm’s litigation group. Adrian Bennett, who has experience in the drafting and prosecution of patent applications, leads the engineering, physics and mechanical devices team, while Mike Jennings heads up the electrical engineering, electronics telecoms and IT group and is praised as ‘a thought leader in this space’. Craig Turner spearheads the chemistry, biotechnology and pharmaceuticals team and handles contentious matters, particularly in the oilfield services and pharmaceuticals sectors. Marianne Privett, who is another key member of the practice, prosecutes patent applications and manages global portfolios.