T 0130/89 (Profile member) vom 07.02.1990

The use of a known material on the basis of its known properties and in a known manner to obtain a known effect in a new combination is not normally inventive ("similar use"). Exceptions to this principle may be allowed in special cases, e.g. where a selection brings unexpected advantages, a known prejudice is orvercome or unforeseen difficulties are encountered, such as the need to alter another component.