If the applicant fulfils the requirements for reduction of the preliminary examination fee, any additional fee is validly paid upon payment of the reduced sum (see point 353).
If the applicant pays one or more additional preliminary examination fee(s) within the time limit set, those parts of the application for which additional fees have been paid will also be examined. Consequently the IPER will be established for all inventions for which a fee for preliminary examination has been paid.
Date retrieved: 30 December 2018
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EPC Implementing Rules
XR.158 EPC The European Patent Office as an International Searching Authority or International Preliminary Examining Authority