The reasons for patent expiration. Expired patents are an extremely important information resource. People generally have misunderstandings about this. They believe that since invalid patents have expired, they have little use value, so they put them aside and let them fend for themselves, resulting in a serious waste of resources. So what are the reasons for patent invalidation? Reasons for patent invalidation What are the reasons for patent invalidation? (1) The patent application documents do not meet the preliminary examination requirements. After accepting a patent application, the State Intellectual Property Office must check whether the application procedures are complete, whether the documents are complete, whether the description complies with the provisions of the patent law, whether the identity of the applicant meets the requirements of the patent law, whether the subject matter of the invention falls within the scope of protection of the patent law, and whether The application fee has been paid for preliminary review. (2) The patent applicant withdraws the application after it is published. After preliminary examination, the State Intellectual Property Office determines that the invention patent application complies with the provisions of the Patent Law and will announce the applicant's invention immediately. The applicant should request substantive examination within the statutory period. (3) The patent applicant fails to respond within the time limit without justifiable reasons. If the State Intellectual Property Office determines that the invention patent does not comply with the provisions of the Patent Law after conducting a substantive examination, it will notify the applicant and require it to state its opinions within a specified time limit or make modifications to its application. If the applicant fails to respond within the time limit without justifiable reasons, it will be deemed to have been withdrawn and the patent will become invalid. (4) It has not applied for patent protection in my country. Patent rights are territorial, and patent rights granted by a country can only be supported and protected within the areas governed by the laws of that country. If a foreign patent does not apply for patent protection in China within one year, it will not be protected by China's patent law, and the patent will become an invalid patent in China. (5) The patentee fails to pay fees on time. The patentee must fulfill the obligation to pay the patent maintenance fee. If the patentee fails to pay the patent maintenance fee on time without justifiable reasons, the patentee will be deemed to have automatically given up the patent right and the patent will become invalid. (6) The invention patent application was rejected. The national patent administration department believed that the patent applicant's statements and modifications still did not comply with the provisions of the patent law and rejected the patent application. (7) The application is withdrawn before the patent is granted or the patent right is declared invalid. If the applicant withdraws the patent application before the patent right is granted, or after the patent right is granted, other units or individuals discover that the grant of the patent right does not comply with the relevant provisions of the Patent Law, the applicant may request the Patent Reexamination Board to declare the patent right invalid. (8) The patentee voluntarily gives up the patent right. Although some patented technologies are still within the protection period, the patentee has deemed it to be of no use value and is unwilling to continue to assume various obligations for it, so he voluntarily declares in writing that he has given up the technology. (9) The protection period expires. After the expiration of the authorized patent protection period, the patentee no longer enjoys exclusive rights. The patent protection period in my country is 20 years from the date of application. The above will provide relevant information on the reasons for patent invalidation. If you want to carry out patent application, patent inquiry, patent transfer and other services, you can contact Bajie Intellectual Property Online Customer Service:. Bajie Intellectual Property received angel investment from the founder of Netac Technology, a company listed on the Chinese Main Board, in 2017, and received investment from Kingdee International, a company listed on the Hong Kong Main Board, in June 2018. It was also listed in the TOP10 China Intellectual Property Service Platforms in 2018 by Internet Weekly.