When can an applicant file a Demand for international preliminary examination?

An applicant can file a Demand for international preliminary examination after filing an international application under Chapter I of the PCT. According to MPEP 1864: “Once applicant has filed an international application under Chapter I of the PCT, applicant has the right to file a demand for preliminary examination under Chapter II of the Treaty.” It’s important to note that a proper Chapter I “Request” must be filed before a Demand can be submitted.

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Tags: chapter i, chapter ii, demand, filing requirements, PCT