Patent right maintenance refers to the process in which the patentee pays a prescribed amount of maintenance fees to the patent administrative department in accordance with the law during the statutory protection period of the patent so that the patent continues to be valid. Patent maintenance time refers to the actual time from the date of application or authorization to the date of invalidation, termination, revocation or expiration. The patent laws of different countries or regions have different calculations of patent maintenance time. Some are calculated from the date of application, and some are calculated from the date of authorization. In my country, the patent maintenance time is calculated from the date of patent application. The patent maintenance time mentioned in this article, unless explicitly stated, refers to the overall maintenance time of the patent, that is, macro data, and does not refer to the maintenance time of individual patents. Extended information In addition, patent rights also have the following legal characteristics: (1) Patent rights are two rights in one, including personal rights and property rights. (2) The patent right must be granted by the Patent Office. (3) The occurrence of patent rights is predicated on the disclosure of invention results. (4) Patent rights are exploitable. If the patentee does not implement or allow others to implement his patent, the relevant departments will take compulsory licensing measures to make full use of the patent.