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Yu Yao

WC Wanhua Chemical Group Co.: 1 patents #4 of 54Top 8%
Overall (2017): #180,071 of 506,227Top 40%
1
Patents 2017

Issued Patents 2017

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9840462 Solvent refining method for isocyanate prepared by phosgene method and devices used in same Hongke Zhang, Dongke Zhao, Weiqi Hua, Bin Chen, Dekai Shi +4 more 2017-12-12