7.015. What is the purpose of the requirement of “unity of invention”? The search fee (see paragraph 5.184(ii) and Annex D) is intended to compensate the International Searching Authority for carrying out an international search on the international application, but only where the international application meets the requirement of “unity of invention.” That means that the international application must relate to only one invention or must relate to a group of inventions which are so linked as to form a single general inventive concept. The requirement of unity of invention is explained in detail in paragraphs 5.114 to 5.123.
Date retrieved: 02 November 2015