GENEVA, Oct. 30 -- CHANGSHA INSTITUTE OF MINING RESEARCH CO.,LTD filed a patent application (CN2025/131966) for “SUBLEVEL MEDIUM-DEEP HOLE MINING METHOD INVOLVING ROOF PRETREATMENT UNDER FRACTURED ORE-ROCK CONDITIONS”. With publication no. WO/2026/222998, here are the other details related to the patent application:
Kind: Initial Publication with ISR [A1]
IPC: E21C 41/16
Notably, the patent application was submitted under the International Patent Classification (IPC) system, which is managed by the World Intellectual Property Organization (WIPO).
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