The process for individuals to request to declare a registered trademark invalid 1. If other units or individuals request the Trademark Review and Adjudication Board to declare the registered trademark invalid, they shall submit an application to the Trademark Review and Adjudication Board; 2. After receiving the application, the Trademark Review and Adjudication Board shall The relevant parties shall be notified in writing and shall submit a defense within a time limit, and may handle the trademark invalidation defense business; 3. The Trademark Review and Adjudication Board shall make a ruling within 9 months to maintain the registered trademark or declare the registered trademark invalid, and notify the parties in writing. If there are special circumstances that require an extension of the time limit, it can be extended for 3 months with the approval of the industrial and commercial administration department of the State Council; 4. If the party concerned is dissatisfied with the ruling of the Trademark Review and Adjudication Board, it may file a lawsuit with the People's Court within 30 days from the date of receipt of the notice; 5. After accepting the lawsuit, the people's court shall notify the other party in the trademark adjudication procedure to participate in the lawsuit as a third party. Trademark invalidation application time period