The purpose of the
SIS is to provide the applicant with a supplementary international search report (SISR) in addition to the search carried out under Article 15 PCT
by the competent ISA ("main search") (see point 221222
). In particular, in view of the growing linguistic diversity of the prior art and considering the language knowledge available in the EPO, a SISR established by the EPO can be very useful to applicants.