The validity period of well-known trademarks is the same as that of ordinary trademarks in most countries and regions, usually 10 year. The validity period of a famous trademark shall be counted from the date of trademark registration.

Before the expiration of the validity period, the trademark registrant may choose to renew the validity period of the trademark. The validity period of a trademark can be extended indefinitely through regular renewal, and the validity period of each renewal is usually 10 year.

It should be noted that the protection of well-known trademarks is not directly related to their validity period. Well-known trademarks usually enjoy a wider scope of protection, and even after the expiration of the validity period of trademarks, they can still be protected by law. This is because well-known trademarks have high popularity and uniqueness and have great influence on the public.

The specific trademark registration and renewal procedures and the provisions of the validity period may vary from country to country and region. It is suggested to inquire about and follow local trademark laws and regulations in trademark registration agencies or professional trademark agencies to ensure that well-known trademarks are effectively protected.

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