Article 43 of the Patent Law stipulates that the patentee shall pay the annual fee from the year when the patent right is granted. If the annual fee is not paid in accordance with the regulations, the patent right cannot be obtained or terminated before the expiration of the time limit.
After a patent application is granted a patent right, an annual fee is required to maintain the validity of the patent right. The legislative purpose of the patent law originates from encouraging inventions and promoting scientific and technological progress, and the annual fee is consistent with the legislative purpose of the patent law, both of which are to continuously protect the legitimate rights and interests of the patentee from infringement.