After the patent application is authorized, it is called an invalid patent because it has exceeded the legal protection period or the patentee has not paid the annual patent fee in time. Invalid patents no longer restrict the use of design technology.
Invalid patent refers to a patent that loses its patent right for some reason (such as failing to pay the annual fee according to the regulations or being declared invalid by others) after the patent is granted. Patent invalidation means that after six months of patent authorization, any unit or individual may request the Patent Reexamination Board to declare the patent invalid if it thinks that the grant of the patent is not in conformity with the relevant provisions of this Law.