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Art. 84 EPC provides that claims must define the matter for which protection is sought. It lays down the relevant principles governing the content and wording of the claims, providing that claims should be clear and concise and be supported by the description. It is supplemented by R. 43 EPC.

CLR II A 1 Basic principles

1.1. Purpose of claims under Article 84 EPC

1.2. Types of claim

1.3. Technical features

1.4. The examination of clarity in opposition proceedings

CLR II A Claims

Basic principles

CLR II PATENT APPLICATION AND AMENDMENTS

A. Claims

B. Unity of invention

C. Sufficiency of disclosure

D. Priority

E. Amendments

CLR I E 3 Indication of a profitable use of the invention in industry

R. 42(1)(f) EPC (former R. 27(1)(f) EPC 1973) prescribes that the description should "indicate explicitly, when it is not obvious from the description or nature of the invention, the way in which the invention is industrially applicable".

CLR I E 2 Reproducibility and sufficiency of disclosure

Another requirement for an invention to be considered susceptible of industrial application within the meaning of Art. 57 EPC is that the technical teaching disclosed in the application under Art. 83 EPC is reproducible.

CLR II A 1.5 Clarity of claims and Article 83 EPC

CLR II A 1.4 The examination of clarity in opposition proceedings

CLR II A 1.3 Technical features

CLR II A 1.2 Types of claim

CLR II A 1.1 Purpose of claims under Article 84 EPC