GENEVA, Nov. 6 -- HENGYANG VALIN STEEL TUBE CO., LTD filed a patent application (CN2025/122317) for “THREADED JOINT FOR OIL CASING”. With publication no. WO/2026/227660, here are the other details related to the patent application:
Kind: Initial Publication with ISR [A1]
IPC: E21B 17/08
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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