Legal basis: Article 25 of the Detailed Rules for the Implementation of the Patent Law of People's Republic of China (PRC). Where an applicant for a patent for invention keeps samples of biological materials in accordance with the provisions of Article 24 of these Detailed Rules, and after the publication of the application for a patent for invention, any unit or individual needs to use the biological materials involved in the application for a patent for invention for experimental purposes, it shall make a request to the patent administration department of the State Council, and specify the following items: (1) the name and address of the applicant; (2) The biological material is not supplied to anyone else.