Legal basis: People's Republic of China (PRC) Patent Law.
Article 43 The patentee shall pay the annual fee from the year when the patent right is granted.
Article 44 In any of the following circumstances, the patent right shall be terminated before the expiration of the time limit:
(a) failing to pay the annual fee in accordance with the provisions;
(2) The patentee waives his patent right in writing.
Where the patent right is terminated before the expiration of the time limit, it shall be registered and announced by the patent administration department of the State Council.