A trademark renewal is the process of maintaining and preserving a registered trademark. It is required to be filed within a certain period of time, usually every 10 years, to keep the trademark active and in force. Failure to file a trademark renewal can result in the cancellation of the trademark registration. The specific time frame for filing a trademark renewal varies by jurisdiction, but it is typically between the 9th and 10th year after the initial registration. In some cases, a trademark owner may be required to file a renewal every 5 years. It is important to keep track of the renewal deadlines and to take the necessary steps to renew the trademark registration to maintain its full legal protection.