Patents are divided into valid patents and invalid patents according to the ownership of the owner.
Valid patent: Generally speaking, a valid patent refers to a patent that is still in a valid state after the patent application is authorized. In order to make the patent in a valid state, the patent right is still within the legal protection period, and the patentee also needs to pay the annual fee according to the regulations.
Invalid patent: after the patent application is authorized, it is overdue or the patentee fails to pay it in time.