New Revision of EPO Patent Filing Rules
The European Patent Office (EPO) has published the 2026 Patent Filing Guidelines, which entered into force on 1 April. These rules bring together guidance that was previously spread across different parts of the European patent system. The EPO is trying to make its procedures clearer and more consistent for applicants who file and manage patent applications in Europe. Entrepreneurs, researchers and businesses dealing with innovation should understand that the Guidelines shape what patents actually protect in Europe and which innovations qualify for patent protection.
One practically important change is that European patent applications can now be filed in DOCX format. DOCX files are easier to edit than PDFs for non-technical users. This may make it easier for inventors and rightsholders (especially startups and small and medium-sized enterprises) to file patent applications themselves without involving professional patent firms. It may also lower barriers to entry for new patent firms, which no longer need sophisticated electronic filing systems. For established players, however, it may increase complexity, as changes will need to be integrated into existing electronic filing systems.
Due to the complexity of international patenting, anyone thinking about filing for patent protection with the EPO is strongly advised to consult a qualified patent professional.