What are the time limits for Shenzhen patent application?

What are the time limits for Shenzhen patent application? With the strengthening of intellectual property protection, many inventions want to apply for patents, so can patent applications be withdrawn? What is the time limit for patent application, and what are the legal provisions on the time limit for patent application? What are the time limits for Shenzhen patent application? 1. What are the time limits for Shenzhen patent application? According to the provisions of the Patent Law, the time limit for filing a patent application is as follows: 1. For the same invention or utility model, the time limit for claiming domestic priority or foreign priority: before the filing date/within 0/2 months; 2. Time limit for foreigners to apply for foreign priority in China for the same design: within six months before the date of application; 3. Where a foreign applicant requests foreign priority, it shall provide the certification period issued by the foreign patent acceptance authority: within three months from the date of filing. 2. Shenzhen Patent Application Method The application for pct invention patent can be directly submitted to China National Intellectual Property Administration through patent agency application. In the process of submitting the patent application documents from China National Intellectual Property Administration to the national patent application, whether applying for the pct invention patent or the Paris Treaty invention patent, it is beneficial to the patent application of the transnational invention patent, thus making the patent authorization area wider and implementing the better patent exclusive license. 3. Time limit for Shenzhen patent application Time limit for early publication of invention patents: within three years from the date of application (or priority date); Time limit for substantive examination of an application for a patent for invention: within three years from the date of application (or priority date); Duration of payment of maintenance fee for application for invention patent: two years from the date of application, and annual payment from the third year;