Claims Under The European Patent Convention

Article 84 of the European Patent Convention (EPC) defines the function of the claims under the European Patent Convention, the function being to define the matter, i.e. the invention, for which patent protection is sought. This legal provision also imposes that the claims must be clear, concise as well as supported by the description of the European patent application or patent. The form and content of the claims are defined in Article 84, and supplemented by the Rule 43 EPC.

The wording of Article 84 is as follows:

The claims shall define the matter for which protection is sought. They shall be clear and concise and be supported by the description.

Read more about Claims Under The European Patent ConventionRationale, Clarity, Applicability in Opposition and Revocation Proceedings

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Claims Under The European Patent Convention - Applicability in Opposition and Revocation Proceedings
... Article 84 may however play a role in opposition proceedings if the patent proprietor makes amendments to the claims during the opposition proceedings ... In opposition proceedings, if the claims of the opposed patent are sufficiently clear for a skilled person to understand them without difficulty, then there is no reason to consult the ...

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