PCT AG-IP 5.058 What does “priority date” mean?

Article 2(xi)

5.058.   What does “priority date” mean?  Where the international application contains a priority claim, “priority date” means the filing date of the application whose priority is claimed.  Where the international application does not contain such a claim, “priority date” means the filing date of the international application.  Where the international application contains two or more claims, “priority date” means the filing date of the earliest application whose priority is claimed.

Source: http://www.wipo.int/pct/en/appguide/text.jsp?page=ip05.html

Date retrieved: 24 November 2017

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PCT Applicant's Guide - International Phase