Before the end of each decade after the date of registration of a U.S. trademark or within a six-month period after the end of each decade, the owner of a registered U.S. trademark must comply with the U.S. According to the provisions of the Hamm Act, you must submit the "Statement of Use" document or the "Statement of Reasonable Reasons for Non-use" document of the U.S. trademark and the "Renewal Application" document of the U.S. trademark. If the applicant fails to submit the above-mentioned documents, the US trademark will be revoked or the US trademark protection period will expire.