1. The invention patent right shall be maintained for 20 years from the date of application, and the utility model or design patent right shall be maintained for 10 years from the date of application, and shall be terminated according to law.
2. Termination of failure to pay the annual fee as required.
3. The patentee voluntarily waives the patent right.
legal ground
Article 44 of the Patent Law stipulates that the patent right shall be terminated before the expiration of the time limit under any of the following circumstances:
(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.