What are the possible reasons why the patent application is invalid?

The theme of the invention-creation for which a patent is applied is unqualified. The invention or utility model for which a patent is applied does not possess novelty, creativity and practicality, and the design for which a patent is applied lacks novelty, aesthetics and non-conflict. The applicant's subject is unqualified. The applicant's main body is unqualified, which mainly refers to the situation that a person without the right to apply for a patent applies for a patent in his own name, thus obtaining a patent right; On the other hand, it refers to the situation that foreigners do not meet the provisions of Article 18 of the Patent Law. The application documents do not conform to the provisions of the third or fourth paragraph of Article 26 of the Patent Law. The application for amendment or division is beyond the scope of the original specification. After the patent right. Post-patent right is a concept relative to prior patent right. Refers to the invention or utility model with the same theme that has been granted the patent right, but was wrongly granted the patent right by the patent administration department of the State Council for some reason. The granted claim is unclear, not concise or lacks the necessary technical features to solve its technical problems.