324. International preliminary examination.

324.     International preliminary examination.

An applicant under an international application1 who is either a resident or national2 of a contracting state which has adhered to Chapter II3 of the Patent Co-operation Treaty may request an international preliminary examination of his application provided that he has filed his application at the receiving office4 of such a contracting state5. The international preliminary examination must be carried out by an international preliminary examining authority6.

The demand for an international preliminary examination must be made separately from the international application itself7, and must