How long does a trademark last?

In Kansas, a trademark lasts indefinitely, as long as it is actively used and its registration is renewed every ten years. The registration of a trademark is voluntary, so the trademark owner must periodically file an Affirmation of Use with the United States Patent and Trademark Office (USPTO). This Affirmation of Use must be filed within the first six years and then again in the 10th year of the registration period to keep the trademark active. If the Affirmation of Use is not filed for six consecutive years, the trademark is legally abandoned and can be used by any other business. The USPTO also requires evidence of use to be provided with each Affirmation of Use. Once registered, a trademark will remain in effect for as long as the owner is actively using it and it is properly renewed and maintained. The length of a trademark registration can potentially be indefinite, as long as the owner is vigilant in their record-keeping and renews it every ten years.

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