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When is the EPO a designated or elected Office?

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When can the EPO act as designated Office? 

5.1.004Since all EPC contracting states are PCT contracting states, the EPO can act as a designated Office for any EPC contracting state, provided the international application was filed on or after the date on which the EPC entered into force for the state concerned (see point 1.8.001).

5.1.005If this requirement is not met, it may be that an extension or validation agreement between the European Patent Organisation and a PCT contracting state was in force on the international filing date that provides for the extension or validation of a European patent application or a European patent to or in the state for which patent protection is sought (see points 2.13.001 ff and 2.14.001 ff).

5.1.006Furthermore, a European patent for any EPC contracting state can be obtained only if neither the application nor the designation of the state concerned was withdrawn during the international phase. 

R. 90bis.1 and .2 PCT

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