The European Patent Convention (EPC), which provides for a centralized procedure for granting of patents in Europe and the establishment of the European Patent Office (EPO), was signed on October 5 1973. The EPC was extensively revised at a Diplomatic Conference held in Munich in November 2000 and the revised text termed EPC 2000. It was agreed that the EPC 2000 would come into force two years after ratification by 15 contracting states. A number of new states have joined the EPC since November 2000 and they have all agreed to ratify EPC 2000. Thus, when on December 13 2005 Greece ratified EPC 2000, Greece became the 15th state to deposit its instrument of ratification. The EPC 2000 will therefore come into force on December 13 2007, at the latest. Any contracting state of the EPC that has not ratified EPC 2000 by this date will cease to be a contracting state of the EPC.