The trademark is invalid as follows: 1. The registered trademark violates the provisions of the Trademark Law; 2. Registration by improper means; 3, improper use of trademarks, improper use of trademarks by the applicant, infringing on the prior rights of others, if the circumstances are serious, the exclusive right to use trademarks shall be revoked; 4. The period of validity of the trademark. The period of validity of a registered trademark is 10 year. Once it exceeds 10 and a half years, the trademark becomes invalid; 5. If the trademark has not been used for three years, and the trademark applicant fails to use the trademark in the registered category within three years after the trademark registration, he may revoke the trademark from the Trademark Office.