To check the validity period of trademark registration, you can follow the steps below:

1. Determine the trademark registration office: Determine the trademark registration office to which your registered trademark belongs, which is usually your The trademark registration authority of the country or region where you are located.

2. Visit the website of the Trademark Registration Office: Visit the official website of the corresponding Trademark Registration Office. Usually, these institutions will provide the function of online query of trademark registration information.

3. Find the query page: Look for the query page related to trademark registration information on the website of the Trademark Registration Office. This may be labeled "Trademark Lookup", "Trademark Database" or something similar.

4. Enter trademark information: On the query page, follow the instructions to enter your trademark information, such as trademark name, trademark registration number, or trademark applicant information.

5. Query results: After submitting the query, you will get the results page of trademark registration information. Among the results, you should be able to find the expiration date information for your trademark.

Please note that the validity period of a trademark registration may vary by country or region. Generally speaking, the validity period of trademark registration is usually 10 years, but it can be renewed multiple times. You can find the trademark's start date and expiration date in the search results to determine its validity period.

If you cannot find the relevant query function on the Trademark Registration Office website, you can also contact the Customer Service Department of the Trademark Registration Office or seek help from a professional intellectual property service agency to obtain more accurate and detailed information. Trademark registration validity period information.

I hope the above information is helpful to you! If you have any other questions, please feel free to ask.

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