专利合作条约实施细则第64.3条涉及文件类型和相关日期的认定、优先权的核实等多个方面,一直是国际审查中的难点。本文基于国际检索报告中相关文件的填写和国际审查书面意见中优先权有效性的核实,对该法条涉及的多种情况进行梳理,再通过实际审查案例帮助理解,旨在总结出清晰明了的审查方法。 Article 64.3 of the Regulations on Patent Cooperation Treaty deals with the determination of the type of documents and the relevant dates, the verification of priority, and other aspects, which have always been the crux of international censorship. Based on the verification of the validity of priority in the international search report and the validity of the priority in the written opinion of the international censorship, the paper sorts out the various situations involved in the article and helps to understand through the actual examination of the case, so as to summarize the clear and definite Review method.