When the term of 1. expires, 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.
Invalidation of patent right:
1. does not have novelty, creativity and practicality, or is the same as or similar to the existing design, or conflicts with the legal rights already obtained by others;
2. The technical scheme in the description of the invention or utility model cannot be realized by technicians in the technical field;
3. The modification of the specification is beyond the scope of the original specification and claims, or the original pictures and photos are beyond the scope of the original specification and claims, or the original pictures and photos;
4. The claim does not explain the scope of protection based on the specification; The scope of protection in the claim is unclear;
5. The independent claim lacks the necessary technical features;
6, in violation of national laws or not within the scope of patent protection.