An invalid trademark may apply for registration as long as it meets the conditions prescribed by law; Article 44 Where a registered trademark violates the provisions of Articles 10, 11 and 12 of this Law, or is registered by deception or other improper means, the Trademark Office shall declare the registered trademark invalid; Other units or individuals may request the Trademark Review and Adjudication Board to declare the registered trademark invalid. When the Trademark Office decides to declare a registered trademark invalid, it shall notify the parties concerned in writing. If a party refuses to accept the decision of the Trademark Office, he may apply to the Trademark Review and Adjudication Board for reexamination within 15 days from the date of receiving the notice. The Trademark Review and Adjudication Board shall make a decision within nine months from the date of receiving the application and notify the parties in writing. There are special circumstances that need to be extended, which can be extended for three months with the approval of the administrative department for industry and commerce of the State Council. If a party refuses to accept the decision of the Trademark Review and Adjudication Board, he may bring a suit in a people's court within 30 days from the date of receiving the notice. Where any other entity or individual requests the Trademark Review and Adjudication Board to declare a registered trademark invalid, the Trademark Review and Adjudication Board shall notify the parties concerned in writing after receiving the application and file a reply within a time limit. The Trademark Review and Adjudication Board shall, within nine months from the date of receiving the application, decide to maintain the registered trademark or declare it invalid, and notify the parties concerned in writing. There are special circumstances that need to be extended, which can be extended for three months with the approval of the administrative department for industry and commerce of the State Council. If a party refuses to accept the ruling of the Trademark Review and Adjudication Board, he may bring a lawsuit to the people's court within 30 days from the date of receiving the notice. The people's court shall notify the other party to the trademark adjudication procedure to participate in the proceedings as a third party. Article 45 Where a registered trademark violates the provisions of Article 13, paragraphs 2 and 3, Article 15, Article 16, paragraph 1, Article 30, Article 31 and Article 32 of this Law, within five years from the date of trademark registration, the prior obligee or interested party may request the Trademark Review and Adjudication Board to declare the registered trademark invalid. For malicious registration, the owner of a well-known trademark is not limited by five years. After receiving an application to declare a registered trademark invalid, the Trademark Review and Adjudication Board shall notify the parties concerned in writing and file a reply within a time limit. The Trademark Review and Adjudication Board shall, within 12 months from the date of receiving the application, decide to maintain the registered trademark or declare it invalid, and notify the relevant parties in writing. There are special circumstances that need to be extended, which can be extended for six months with the approval of the administrative department for industry and commerce of the State Council. If a party refuses to accept the ruling of the Trademark Review and Adjudication Board, he may bring a lawsuit to the people's court within 30 days from the date of receiving the notice. The people's court shall notify the other party to the trademark adjudication procedure to participate in the proceedings as a third party. In the process of examining the request for invalidation in accordance with the provisions of the preceding paragraph, if the determination of the prior rights involved must be based on the results of another case being tried by the people's court or being handled by the administrative organ, the Trademark Review and Adjudication Board may suspend the examination. After the reasons for suspension are eliminated, the review procedure shall be resumed. To sum up, there are generally no unregistered trademarks or invalid trademarks on the trademark network. As an invalid trademark, under legal conditions, you can apply for registration, and you must submit relevant materials to prove that it can be registered successfully and protect your own interests from damage.