Recently, the reexamination authorities of the five intellectual property offices — CNIPA, USPTO, EPO, JPO, and KIPO (collectively referred to as IP5) — released the first-ever User Guide of IP5 Trial and Appeal Procedures in 2025. The Guide compiles the fundamental procedural rules and practical operational processes for patent re-examination and post-grant proceedings across the five offices, including essential information, trial procedures, amendment rules, user policies, and commonly used resources of the IP5 reexamination authorities, and aims to assist global users in understanding patent grant and validity systems, flexibly utilizing relevant trial procedures, thereby facilitating transnational protection for global users and empowering international economic and trade cooperation.

Annex: User Guide of IP5 Trial and Appeal Procedures（EN）202509.pdf

(Source: CNIPA)