Priority entitlement and sufficiency of disclosure – T 883/23
EPO case law, EPO practice, EPO T decisions Michał Dąbrówka EPO case law, EPO practice, EPO T decisions Michał Dąbrówka

Priority entitlement and sufficiency of disclosure – T 883/23

T 883/23 serves as a reminder that compliance with the requirement of “the same invention” of Article 87(1) EPC is not merely a matter of direct and unambiguous disclosure; notably, the claimed subject matter must have also been sufficiently disclosed in the earlier application. Read more in our latest blog post.

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Added subject matter, unclear parameters - T 1184/23 and T 1440/23
EPO case law, EPO oppositions and appeals, EPO practice, EPO prosecution, EPO T decisions Michał Dąbrówka EPO case law, EPO oppositions and appeals, EPO practice, EPO prosecution, EPO T decisions Michał Dąbrówka

Added subject matter, unclear parameters - T 1184/23 and T 1440/23

Two recent decisions from the EPO’s Technical Board of Appeal (T 1184/23 and T 1440/23) highlight the complexities of drafting, prosecuting and defending chemical patent applications with parametric definitions in the claims. Our latest article explains the key takeaways from both cases, offering practical guidance for applicants navigating clarity and added subject matter requirements before the EPO.

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