5.5. Parameters

If an essential feature of the invention is expressed by a parametric definition, the question is whether the parameter is so defined that the person of the art, on the basis of the disclosure of the patent as a whole and using his common general knowledge, could identify, without undue burden, the technical measures leading to the claimed subject-matter (T 61/14).

This section looks at the case law on parameters, which often addresses them in the context of methods of measuring them. Parameters are also dealt with elsewhere in this chapter: II.C.6.6.4 "Forbidden area of the claims" and II.C.8.2. "Article 83 EPC and clarity of claims".