1, the protected objects are different.
The protected objects of the invention can be technical schemes such as materials, uses, production processes and structures.
The protection object of the utility model can only be the technical scheme based on the shape and structural characteristics.
2. The protection period is different.
20 years of inventions and 10 years of utility models
3. The review process is different.
Application for a patent for invention-preliminary examination-publication-substantive examination-authorization
Application for utility model-preliminary examination-authorization
4. Different costs
The official fees and service fees for invention patents are much more expensive than those for utility models.