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Extension and designation states of a European patent

We recapitulate here the date of entrance and the applicability in the time of the accession of new member states to the EPC since 2000

Contracting Extension Date of entry into force
TR November 1st, 2000
BG, CZ, EE, SK July 1st, 2002
SI December 1st, 2002
HU January 1st, 2003
RO March 1st, 2003
PL March 1st, 2004
HR April 1st, 2004
IS November 1st, 2004
RS (YU) November 1st, 2004
LT December 1st, 2004
BA December 1st, 2004
LV July 1st, 2005
MT March 1st, 2007
HR, NO January 1st, 2008
MK January 1st, 2009
SM July 1st, 2009
ME March 1st, 2010
AL May 1st, 2010
RS October 1st, 2010

European Patent

Only European patent applications filed on or after the date of entrance into force may designate the new member states.

No retroactively designation is possible.

PCT

Only PCT applications filed on or after the date of entrance, which designate European Patent, will include the new EPC contracting states.

Slovenia (SI) can no longer be designated through a national patent but must be designated through a European Patent.

Extensions states

It has to be noted that SI, RO, HR and MK were extension states.

The extension system will continue to apply to all EP and PCT applications filed prior the date of entrance with regard to these states.