Article 45 of the "Patent Law" stipulates: From the date when the patent administration department of the State Council announces the grant of a patent right, any unit or individual that believes that the grant of the patent right does not comply with the relevant provisions of this Law may Request the Patent Reexamination Board to declare the patent invalid. There is no time limit for declaration of invalidity. If you have objections to the novelty of a pre-grant invention patent application, you can submit a statement of opinion to the Patent Office to express your opinions on the objectionable patent application and promptly submit patent or non-patent documents and other evidence related to the background technology.
For more intellectual property issues, please consult Bajie Intellectual Property