Prepare the materials for the invalidation request, submit them to the review committee in person or by mail, and pay the invalidation request fee - formal review - issue a notice of correction - if the correction is qualified, issue a notice of acceptance - supplementary reasons, Statement of opinion - issue an oral hearing notice to both parties - participate in the oral hearing - issue an invalidation review decision;
It is recommended to entrust a professional and formal patent agency to handle it. For example, Beijing Hengbo Intellectual Property focuses on patent invalidation. A comprehensive intellectual property service provider that has served many well-known large customers.