The Convention on the Unification of Certain Points of Substantive Law on Patents for Invention, also called Strasbourg Convention or Strasbourg Patent Convention, is a multilateral treaty signed by Member States of the Council of Europe on 27 November 1963 in Strasbourg, France. It entered into force on 1 August 1980, and led to a significant harmonization of patent laws across European countries.
This Convention establishes patentability criteria, i.e. specifies on which grounds inventions can be rejected as not patentable. Its intent was to harmonize substantive patent law but not procedural law.