The term of the invention patent right is 20 years, and the term of the utility model patent right and the design patent right is 10 years, both counting from the date of application. The starting date of patent protection is from the date of authorization. In any of the following circumstances, the patent right shall be terminated before the expiration of the time limit: ① the annual fee has not been paid in accordance with the regulations; (2) The patentee waives his patent right in writing. There are also P kinds of situations where the patent term expires, the patent is terminated and the protection of nature is terminated. ? Trademark protection period refers to the effective period of the exclusive right to use a trademark protected by law. The period of validity of a registered trademark in China is ten years, counting from the date of approval of registration. A registered trademark may be renewed upon expiration; Trademark renewal refers to extending the validity of the original registered trademark through certain procedures, so that the trademark registrant can continue to maintain the exclusive right to use its registered trademark. During the term of copyright, the work is protected by copyright law; When the copyright expires, the copyright is lost and the work enters the public domain. There is no legal limit on the confidentiality period of trade secrets. As long as the four basic characteristics of trade secrets have not disappeared, the obligee can always keep the trade secrets. The obligee may also set an appropriate time limit for trade secrets according to the actual situation.