GENEVA, Nov. 23 -- WANHUA CHEMICAL GROUP CO., LTD. (No. 59, Chongqing Street, YedaYantai, Shandong 264006), 万华化学集团股份有限公司 (中国山东省烟台市经济技术开发区重庆大街59号) filed a patent application (PCT/CN2024/104431) for "PREPARATION METHOD FOR DIAMINES AND POLYAMINES OF DIPHENYLMETHANE SERIES" on Jul 09, 2024. With publication no. WO/2025/236382, the details related to the patent application was published on Nov 20, 2025.
Notably, the patent application was submitted under the International Patent Classification (IPC) system, which is managed...