Objective Claim Interpretation: T 1452/24 on Separating Meaning from Compliance
Technical Board of Appeal 3.4.02 clarifies that claim interpretation must remain independent of whether a specific reading leads to an EPC violation. A claim cannot be construed merely to avoid a finding of unallowability or revocation.
The doctrinal debate over how a patent claim should be interpreted when its wording invites a potential violation of the European Patent Convention has long challenged practitioners. Decision T 1452/24 from Technical Board of Appeal 3.4.02 addresses this tension directly, establishing a strict procedural sequence. The Board ruled that the correct interpretation of a claim must be determined entirely independently of whether that interpretation results in a failure to meet a requirement of the Convention.
How does a potential EPC violation influence claim interpretation?
In proceedings concerning an electromagnetic encoder utilizing a magnetoimpedance effect, the Board was confronted with a scenario where the interpretation of a claim feature could lead to a violation of the European Patent Convention. The central legal question was whether a claim should be construed in a manner that deliberately avoids such a violation. The Board provided a clear answer in its catchword. If a claim contains a possible violation of a requirement of the Convention, the correct interpretation of the claim is not automatically the one under which the violation ceases to exist. Instead, the determination of the correct interpretation is completely independent of this question (T 1452/24, reasons 2.6).
Why did the Board separate the interpretation from the compliance assessment?
The reasoning in T 1452/24 requires a strict separation between determining what a claim means and assessing whether that meaning complies with the law. A teleological approach that bends the objective meaning of the claim wording simply to save the claim from an objection is rejected by the Board. The skilled person reads the claim objectively in the context of the relevant technical field, which in this case involved magnetic variables and encoder arrangements classified under G01D 5/245 and G01R 33/00. If that objective reading results in a scope that extends beyond the content of the application as filed, or lacks sufficiency of disclosure, the claim will not be allowed. The interpretation should not be reverse-engineered from the desired legal outcome.
How did this independent interpretation affect the substantive findings for the electromagnetic encoder?
By applying this independent interpretation standard, the Board evaluated the claims of the electromagnetic encoder application objectively. Because the interpretation was not artificially narrowed or shifted to avoid objections, the Board could assess the actual technical contribution on its own merits. The decision confirms that, under the correct independent interpretation, the claims successfully met the requirements for sufficiency of disclosure. Furthermore, the amendments were found not to extend beyond the content of the application as filed. Finally, the claimed subject-matter was found to involve an inventive step. The objective interpretation ultimately supported the allowability of the claims without needing to artificially construe the wording to avoid a hypothetical violation.
What must practitioners change when arguing claim interpretation after T 1452/24?
When defending a European patent application or a granted patent, practitioners can no longer safely rely on the argument that a claim must be interpreted in a specific way simply because any other interpretation would lead to its refusal or revocation. The "mind willing to understand" does not equate to a mind willing to rewrite the claim to ensure compliance with the European Patent Convention. Applicants, patent proprietors, and opponents alike must first establish the objective technical meaning of the claim wording based on the perspective of the skilled person. Only after this independent interpretation is fixed can compliance with the requirements of sufficiency of disclosure, Article 123(2) EPC, and inventive step be assessed. Arguments that attempt to merge these two distinct steps are unlikely to succeed under the standard set by T 1452/24.