Is there a legal time limit for patent application?

Legal analysis: the time for patent application is limited by law. And within six months before the filing date. According to the relevant laws and regulations, within six months before the filing date, if there is no corresponding legal reason for the invention-creation for which a patent is applied, and the local patent administration department does not apply for a patent, the utility model will lose its novelty.

Legal basis: People's Republic of China (PRC) Patent Law.

Article 2 Inventions and creations mentioned in this Law refer to inventions, utility models and designs. Utility model refers to a new practical technical scheme for the shape, structure or combination of products.

Article 24 An invention-creation applying for a patent shall not lose its novelty in any of the following circumstances within six months before the date of filing:

(a) When the country is in a state of emergency or an extraordinary situation, it shall be published for the first time for the purpose of public interest;

(2) It was exhibited for the first time at an international exhibition sponsored or recognized by the China Municipal Government;

(3) It was first published at a specific academic conference or technical conference;

(4) Others disclose the contents of the application without the consent of the applicant.