Legal analysis: The so-called estoppel principle refers to the estoppel in the patent approval process. Its meaning is that if the patentee, during the patent approval process, in order to meet the statutory authorization requirements If the scope of a claim is restricted (such as through restrictive modifications or interpretations), when asserting a patent right, the content abandoned through such restriction shall not be included in the scope of protection of the patent right.
Legal basis: "Interpretations of the Supreme People's Court on Several Issues Concerning the Application of Law in the Trial of Patent Rights Infringement Dispute Cases" Article 6 Patent applicants and patentees shall, during the patent authorization or invalidation procedure, pass the right If a technical solution is abandoned as a result of a request, modification of the specification, or statement of opinions, and the right holder includes it within the scope of patent protection in a patent infringement dispute case, the People's Court will not support it.