Jianfeng Li

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Shandong, CN

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Patents Grantslast 30 patents

Information Patent Grant
Preparation method for polyurethane optical resin and applications...
- Patent number 12,024,582
- Issue date Jul 2, 2024
- WANHUA CHEMICAL GROUP CO., LTD.
- Jianfeng Li
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Jet reactor with flow ducts and process for preparing isocyanates u...
- Patent number 8,206,652
- Issue date Jun 26, 2012
- Ningbo Wanhua Polyurethanes Co., Ltd.
- Yonghua Shang
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
XYLYLENE DIISOCYNATE COMPOSITION, PREPARATION METHOD THEREFOR AND U...
- Publication number 20240166795
- Publication date May 23, 2024
- WANHUA CHEMICAL GROUP CO., LTD.
- Fulin ZHU
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
1,3-BISISOCYANATOMETHYLCYCLOHEXANE COMPOSITION AND OPTICAL RESIN PR...
- Publication number 20220402865
- Publication date Dec 22, 2022
- WANHUA CHEMICAL GROUP CO., LTD.
- Fulin ZHU
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
PREPARATION METHOD FOR POLYURETHANE OPTICAL RESIN AND APPLICATIONS...
- Publication number 20220227915
- Publication date Jul 21, 2022
- WANHUA CHEMICAL GROUP CO., LTD.
- Jianfeng LI
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
JET REACTOR WITH FLOW DUCTS AND PROCESS FOR PREPARING ISOCYANATES U...
- Publication number 20110124907
- Publication date May 26, 2011
- Yonghua Shang
- C07 - ORGANIC CHEMISTRY