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Extension states

Between 1993 and 2009, the European Patent Organisation concluded Extension agreements with 10 non-member states. Agreements with two of these countries are still in force:


  • BA Bosnia and Herzegovina

  • ME Montenegro


As regards the remaining eight countries (former Extension states, current Member states), please note that the Extension system remains applicable to European and international patent applications filed before the termination of the relevant Agreement and to European patents granted on the basis of such applications. For the complete list of the Extension agreements concluded by the European Patent Organisation, please refer to the table.