4.2 Euro-PCT applications 

For Euro-PCT applications where the EPO acted as ISA or SISA, the examining division has to issue an invitation under Rule 164(2) for any now claimed but unsearched invention contained in the originally filed application documents (description, claims and drawings, if any) which are to serve as the basis for examination upon expiry of the six-month time limit set in the communication under Rule 161 or Rule 162 (see C‑III, 3.1). For the purpose of Rule 137(5), in the subsequent examination procedure, the originally claimed invention of a Euro-PCT application is the invention searched by the EPO in the international phase or the invention searched under Rule 164(2).