Haijun Li

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Yantai, CN

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Patents Grantslast 30 patents

Information Patent Grant
Storage-stable polyisocyanate composition and preparation method
- Patent number 12,304,993
- Issue date May 20, 2025
- WANHUA CHEMICAL GROUP CO., LTD
- Zhicheng Zhu
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Method for preparing biuret polyisocyanate
- Patent number 9,701,624
- Issue date Jul 11, 2017
- Wanhua Chemical Group Co., Ltd.
- Bin Shi
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
STORAGE-STABLE POLYISOCYANATE COMPOSITION AND PREPARATION METHOD TH...
- Publication number 20230272151
- Publication date Aug 31, 2023
- WANHUA CHEMICAL GROUP CO., LTD.
- Bin SHI
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
STORAGE-STABLE POLYISOCYANATE COMPOSITION AND PREPARATION METHOD
- Publication number 20230132686
- Publication date May 4, 2023
- WANHUA CHEMICAL GROUP CO., LTD.
- Zhicheng ZHU
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
Method For Preparing Biuret Polyisocyanate
- Publication number 20160311765
- Publication date Oct 27, 2016
- WANHUA CHEMICAL GROUP CO., LTD.
- Bin Shi
- C07 - ORGANIC CHEMISTRY