The trademark is invalid for five years from the date of approval of the registered trademark, and the owner of a well-known trademark is not restricted by the five-year period of malicious registration. Time for applying for invalidation of a trademark: 1, 15 days: the trademark owner may apply to the Trademark Review and Adjudication Board for trademark reexamination within 15 days after receiving the Notice of Invalidation of a Trademark. 9 months: The Trademark Review and Adjudication Board shall make a review decision within 9 months, and it may be extended for 3 months under special circumstances. 3.30 days: If the audit fails, the owner may bring a lawsuit to the people's court within 30 days from the date of receiving the notice.