1. The trademark law of the United States stipulates that a trademark that has been successfully registered shall submit a certificate of use to the United States Patent and Trademark Office within the fifth and sixth years from the date of trademark registration, so as to maintain the validity of the registered trademark.

if a registered trademark is not used for special reasons, the reasons shall be explained and it shall be indicated that the use of the trademark will not be abandoned, otherwise the trademark will be revoked.

2. If a registrant uses its registered trademark in the United States for five consecutive years from the date of trademark registration, he can obtain the "indisputable" right through application. Once the "indisputable" right is obtained, the registrant has conclusive evidence of the exclusive right to use its trademark in trade, and any third party can no longer request the cancellation of the trademark registration on the grounds that the trademark lacks distinctiveness.

3. A registered trademark in the United States is valid for 1 years, and the use certificate or reasons for not using it are still required for each renewal, otherwise, the United States Patent and Trademark Office will cancel the registration of the trademark.

4. One year before the expiration of the American trademark, the trademark renewal period is missed, and there will be a half-year extension period after the expiration of the trademark. After the expiration of the American trademark, it should be examined in time to guarantee the exclusive right of the trademark.