The Madrid Trademark Registration System is an international trademark registration system managed by the Madrid Union. The following is some information about the deadline for Madrid trademark registration:

1. Main application deadline: When submitting an application for Madrid trademark registration, the main applicant needs to complete the application process within the specified period. Generally, the main applicant should submit an application for international trademark registration to the Madrid Union within 12 months after submitting the domestic trademark application.

2. Transit period: The Madrid trademark registration system adopts a transit procedure, that is, international trademark applications need to be reviewed by the trademark offices of each member country or region. These member states or regions have a certain amount of time to review the application and raise objections or refuse registration. The transit period is usually 18 months.

3. Preliminary protection period: Once the international trademark registration application is approved, the trademark owner enjoys preliminary protection in each member country or region. The initial protection period is 5 years, starting from the date of international registration.

Please note that specific deadlines and times may vary depending on the trademark laws and regulations of member states or regions. It is recommended that when considering using the Madrid trademark registration system, you should learn more about the relevant requirements and deadlines of the target member country or region, and consult a professional trademark agency or lawyer for accurate guidance and advice.

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