Enlarged Board of Appeal: G 1/25 Alters Patent Description Adaptation Rules

The Enlarged Board of Appeal (EBA) of the European Patent Office (EPO) today issued decision G 1/25, holding that the description in a patent application must be adapted only when an “inconsistency” between the claims and description leads to non-compliance with another requirement of the European Patent Convention (EPC). This landmark ruling significantly refines the long-standing practice of adapting the description to align with the claims during patent prosecution. Previously, EPO practice often required extensive amendments to remove any subject matter not explicitly covered by the claims, even if not directly contradictory. G 1/25 narrows this requirement, stipulating that adaptation is only necessary when an “inconsistency” actively causes a failure to meet other EPC requirements, such as clarity or support. The EBA also clarified that the legal basis for such adaptation stems from existing EPC provisions and has begun to define what constitutes this crucial “inconsistency.”

This ruling carries substantial implications for patent applicants, patentees, and their legal representatives practicing before the EPO. It potentially alleviates the burden of extensive description amendments, which have often been a source of contention and delay during examination. However, the precise definition of “inconsistency” and its practical application by examination divisions will be critical. While it might simplify prosecution in some cases, it could also introduce new uncertainties regarding the scope of required amendments and the interpretation of “non-compliance with another requirement of the EPC.” Practitioners will need to carefully assess their drafting strategies and amendment practices to align with this new, more nuanced standard, as the shift from a broad “consistency” requirement to a narrower “inconsistency causing non-compliance” standard is significant.

The decision G 1/25 originates from the Enlarged Board of Appeal, which is the highest judicial body of the European Patent Organisation, responsible for ensuring uniform application of the European Patent Convention (EPC) and for deciding points of law of fundamental importance. The EPC itself is the foundational legal framework governing the granting of European patents. Specifically, this decision touches upon various articles of the EPC, particularly those related to the requirements for patentability, such as Article 84 (Clarity of claims) and Article 69 (Extent of protection), as well as the general principles of support and enablement. The EBA's interpretation of “inconsistency” and its link to other EPC requirements will shape future examination guidelines and case law, potentially altering the landscape of patent prosecution in Europe.

The primary judicial body involved is the Enlarged Board of Appeal (EBA) of the European Patent Office (EPO), which issued the decision G 1/25. While the specific parties to the referral are not detailed in the excerpt, the decision impacts all applicants and patentees seeking or holding European patents, as well as the EPO's examination divisions and opposition divisions responsible for applying the EPC. This decision will directly influence how patent applications are examined and granted across the 39 member states of the European Patent Organisation.

Attorneys and patent professionals should immediately review their current patent drafting and prosecution strategies, particularly concerning the adaptation of the description. It is crucial to understand the EBA's evolving definition of “inconsistency” and how it will be applied by EPO examiners. While the decision may reduce the need for certain types of description amendments, practitioners must remain vigilant to ensure that the description fully supports the claims and does not contain any “inconsistencies” that could lead to non-compliance with other EPC requirements. Monitoring future EPO guidelines and subsequent case law interpreting G 1/25 will be essential to navigate this new landscape effectively and advise clients on the most robust patenting strategies.