T 2380/16 - the meaning of may
Independent claim 1 of the main request begins as follows:
A press fabric for a pulp machine having a multilayer structure obtained by weaving warps, each of which is selected from a group consisting of a monofilament, a monofilament twisted yarn, and a twisted yarn having a monofilament as a core with, as wefts, (...).
The underlined part being added compared to claim 1 as filed. The opposition division found this addition to be added subject matter, since this formulation also covers a mixture of different types of monofilaments, yet the application only appears to give examples where a single type is used.
The board did not agree.