Whether (1) conforms to the definition of invention stipulated in Article 2 of the Patent Law, that is, the new technical scheme proposed for the product, method or its improvement.
(2) Whether it complies with the provisions of Article 5 of the Patent Law, that is, whether the subject matter of the patent application violates national laws, social morality or harms public interests;
(3) Whether it complies with the provisions of Article 25 of the Patent Law, that is, whether the subject matter of the patent application belongs to the scope where the patent right cannot be granted;
(5) Whether the specification fully discloses the subject matter requested for protection in accordance with the requirements of the third paragraph of Article 26 of the Patent Law;
(6) Whether the technical scheme defined in the claim has novelty and creativity as stipulated in the second and third paragraphs of Article 22 of the Patent Law;
(7) Whether the claim clearly and concisely defines the scope of protection according to the fourth paragraph of Article 26 of the Patent Law, and whether the independent claim expresses a complete technical solution to technical problems;
(8) Whether the modification of the application documents conforms to the provisions of Article 33 of the Patent Law and Article 51 of the Detailed Rules for the Implementation;
There is no limit on the number of patent examinations in China's laws, that is, there is no limit on the number of times.
Legal basis: Article 3 of the Patent Law of People's Republic of China (PRC), the State Council Patent Administration Department is responsible for the management of patent work throughout the country; Accept and examine patent applications in a unified manner and grant patent rights according to law. The departments for patent administration under the people's governments of provinces, autonomous regions and municipalities directly under the Central Government shall be responsible for patent administration within their respective administrative areas.