Extension states

Between 1993 and 2009, the European Patent Organisation signed extension agreements with ten 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 termination of the relevant agreement and to European patents granted on the basis of such applications. For the complete list of extension agreements concluded by the European Patent Organisation, please refer to the following table:

Country
Official title
Agreement signed on
Entry into force on
Termination of the Agreement
Slovenia Agreement implementing Article 3(3) of the Co-operation Agreement between the Government of the Republic of Slovenia and the European Patent Organisation of 2 July 1993 2.7.1993 1.3.1994 30.11.2002
Lithuania Agreement implementing Article 3(3) of the Co-operation Agreement between the Government of the Republic of Lithuania and the European Patent Organisation of 25 January 1994 25.1.1994 5.7.1994 30.11.2004
Latvia Agreement implementing Article 3(3) of the Co-operation Agreement between the Government of the Republic of Latvia and the European Patent Organisation of 25 January 1994
25.1.1994 1.5.1995 30.6.2005
Romania Agreement between the Government of Romania and the European Patent Organisation on co-operation in the field of patents (Co-operation Agreement) 9.9.1994 15.10.1996 28.2.2003
Croatia Agreement between the Government of the Republic of Croatia and the European Patent Organisation on co-operation in the field of patents (Co-operation and Extension Agreement) 16.6.2003 1.4.2004 31.12.2007
Albania Agreement between the Government of Albania and the European Patent Organisation on co-operation in the field of patents (Co-operation Agreement) 3.11.1995 1.2.1996 30.4.2010
The former Yugoslav Republic of Macedonia Agreement on co-operation in the field of patents between the Government of the Former Yugoslav Republic of Macedonia and the European Patent Organisation (Co-operation Agreement)
24.6.1997 1.11.1997 31.12.2008
Serbia Agreement between the Federal Government of the Federal Republic of Yugoslavia and the European Patent Organisation on co-operation in the field of patents (Co-operation and Extension Agreement) 26.11.2001 1.11.2004 30.9.2010
Bosnia and Herzegovina Agreement between Bosnia and Herzegovina and the European Patent Organisation on co-operation in the field of patents (Co-operation and Extension Agreement) 1.12.2003 1.12.2004 still in force
Montenegro Agreement between the Government of Montenegro and the European Patent Organisation on extension of European patents (Extension Agreement) 13.2.2009 1.3.2010 still in force

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