The supplementary international search system is optional for both applicants and International Authorities. Its purpose is to enable applicants, during the international phase, to obtain further supplementary searches from other Authorities so that they have a better basis for deciding whether or not to enter the regional phase.

Rule 45bis

OJ EPO 2010, 304

OJ EPO 2010, 316

OJ EPO 2014, A117

OJ EPO 2017, A115
OJ EPO 2018, A24
GL/ISPE 2.2015.76

The EPO as SISA only accepts a limited number of SIS requests per year. Since 2010, the EPO has limited the number of SIS requests it will accept to 700 per year.

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