Where claims fees are to be paid, they must be paid within the 31-month time limit. If the applicant fails to pay (the correct amount of) claims fees in due time, he is invited in the Rule 161 EPC
/Rule 162 EPC
communication to pay the missing amount within the non-extendable six-month time limit set therein (see point 491
). If a supplementary European search is carried out, it will relate to the last set of claims received before expiry of the six-month time limit and will be confined to claims for which any claims fees, where applicable, have been paid in due time.