5.15
Lack of unity 
5.15.001
Where the Euro-PCT application does not meet the requirement of unity of invention, the procedure laid down in Rule 164 EPC applies upon entry into the European phase.
5.15.002
Rule 164 EPC provides the applicant with an opportunity to pay upon invitation, within a two-month period, a further search fee for any invention which has not been searched by the (Supplementary) International Searching Authority in the international phase but which the applicant claims upon expiry of the time limit set in the communication under Rules 161 and 162 EPC. This opportunity is available both where a supplementary European search is to be carried out (the EPO was not the (S)ISA) and where the supplementary European search is dispensed with (the EPO acted as (S)ISA). The further search fees are not subject to the fee reduction under Article 153(7) EPC (see point 5.9.017), which applies only to the search fee payable under Rule 159(1)(e) EPC. Moreover, any further search fees cannot be validly paid until an invitation pursuant to Rule 164 EPC has been issued. The inventions for which a further search fee is paid will be searched by the EPO. The search will not be based on any amendments filed in response to an invitation to pay search fees.
5.15.003
Where applicants use automatic debiting, all search fees to be paid under Rule 164 EPC will be automatically debited on the last day of the two-month period set in the invitation. If they do not wish to pay any or some of the fees, they must therefore notify the EPO accordingly.
ADA, Annex A.1, point 4, Annex A.2, item I and I.2 
5.15.004
The further search fees must be paid within the non-extendable two-month time limit set in the invitation. This time limit is excluded from further processing, but re-establishment of rights may be requested. 
5.15.005
If applicants disagree with the finding of lack of unity made by the search division or the examining division, they may request the examining division to review this finding and to refund the search fees paid. 
5.15.006
An invention that has not been searched by the EPO cannot be prosecuted in examination. If applicants do not take the opportunity to pay search fees under Rule 164 EPC, they will be requested by the examining division to delete any unsearched subject-matter. Any searched or unsearched invention which is not prosecuted in the examination proceedings may be pursued in a divisional application.

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