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Stéphanie CELAIRE


French Patent Attorney

European Patent Attorney

Life Sciences & Chemistry Department
Tel: +33 1 44 29 35 00


French Patent Attorney

European Patent Attorney


Master’s in Engineering (Institut National Agronomique Paris-Grignon)
MS in Biochemistry (Institut Gustave Roussy, Paris X- I.N.A P-G)
CEIPI Graduate (Distinction in Patents)
Master of Business Law (Paris I)


After three years of academic research in France (Post-Doc at the IGR) and six years’ experience and a patent engineer in an IP Law firm, Stéphanie CELAIRE joined REGIMBEAU in 2008 and became Partner in 2014.
Stephanie has a vast experience in European oral proceedings and infringement litigation in France, especially in the pharmaceutical and agribusiness fields.

Technical and scientific fields

Pharmaceuticals, Formulations, Galenics, Cosmetology, Agribusiness and Agronomy, Biochemistry

Teaching / Representative positions

  • Lecturer at the ESIEE, specialising in Biology
  • Lecturer at AgroParis Tech  


  • Nominated as one of the world's leading patent practicioners by "Who's Who Legal: Patents" in 2016, 2021 and 2022
  • Distinguished in 2020, 2021 and 2022 in the "Recommended individuals" category by JUVE Patent (Field of expertise: Chemistry, Pharma and biotechnology)​

Recent contributions and participations


Webinar - Implementation of the European Patent with Unitary Effect and the Unified Patent Court: the countdown is on!

The entry into force of the European patent with unitary effect and the Unified Patent Court is now expected for October 2022. What changes for European patent applicants in 2022? What strategies should they adopt? Our experts Stéphanie Celaire, Sylvain Thivillier, Frédérique Durieux will present the new system and its implications, as well as its budgetary impact. Registration by email to:
10th May 2022

PACTE Act & New IP protection strategies

REGIMBEAU organizes a breakfast conference on the theme "PACTE Act & New IP protection strategies - Utility certificate, provisional patent & procedure of opposition to French patents". Intervention of Stéphanie CELAIRE, Partner.
23th Jan 2020

FORMATION : The basics of patent procedures

Regimbeau organizes a training on the theme "The basics of patent procedures". Intervention of Stéphanie CELAIRE, Partner.
26th Jun 2018

IP Days 2017 P2i

Contribution by Stéphanie CELAIRE, partner, at the round table on unitary patent at the IP & Innovation Days organised by CCI Alsace and 3AF in collaboration with CCI France.
12th Oct 2017

Recent Publications

Whether or not to opt out of the competence of the unified patent court: another issue for european patent owners

Par Frédérique DURIEUX et Stéphanie MASSIN CELAIRE, French and European Patent Attorneys
The Unified Patent Court will have exclusive competence for all European patents, as well as for supplementary protection certificates (SPCs) granted for a product protected by a European patent. If this exclusive competence is obligatory for European patents with unitary effect, it will be possible, during a transitional period, to opt out of the UPC’s exclusive competence for European patents not benefiting from the unitary effect. European patent owners should therefore start thinking about their opt-out strategy now.
Published on: 21th April 2022

European patent with unitary effect: soon it will be time to choose !

By Frédérique DURIEUX and Stéphanie CELAIRE, French & European Patent Attorneys
The European patent with unitary effect will come into force in a few months. Now is therefore time for applicants for European patents to define their strategy.
Published on: 1st March 2022

The European Patent with Unitary Effect and the Unified Patent Court will come into being in 2022

By Stéphanie MASSIN CELAIRE, Partner
It's been a long and bumpy road, but here we are! The provisional application protocol (PAP) enters into force today. During this period of provisional application, which is expected to last about 8 months, the Preparatory Committee will set up the administrative bodies of the Unified Patent Court (UPC). In particular, the Preparatory Committee will recruit the judges.
Published on: 19th Jan 2022




Plant Breeders’ Right



Due Diligence - Strategy

IP Prosecution


Portfolio management

Freedom to operate


Press release

JUVE Patent – 2022 Rankings

JUVE Patent, a recognized platform specialized in the European patent market, has published its annual rankings, identifying the best Patent law firms in Europe. REGIMBEAU is ranked in the “recommended patent firms” for the Patent filing category. Stéphanie CELAIRE and Emmanuelle LEVY have been named “Leading Individuals” in the “Patent attorneys with technical specialty” category for their technical specialty in "Chemistry, Pharma and biotechnology" and Jérôme COLLIN have been recommended in the field "Digital communication and computer technology, Medical technology".
Published on: 5th April 2022
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