Legal analysis: The useful life of a trademark is ten years. The validity period of a registered trademark refers to the protection period of the exclusive right of a registered trademark. A registered trademark is protected by law, and the registrant has exclusive rights over it for a period of time. Upon expiration of the validity period, the trademark right is no longer protected by law.

Legal basis: "Trademark Law of the People's Republic of China" Article 49 If a registered trademark becomes the common name of the goods approved for use or has not been used for three consecutive years without justifiable reasons, any unit shall Or an individual can apply to the Trademark Office to cancel the registered trademark. The Trademark Office shall make a decision within nine months from the date of receipt of the application. If there are special circumstances that require an extension, it can be extended for three months with the approval of the industrial and commercial administration department of the State Council.