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last 30 patents
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Patent Grant
Method for preparing isophorone diisocyanate
Patent number
11,939,280
Issue date
Mar 26, 2024
WANHUA CHEMICAL GROUP CO., LTD
Yong Yu
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Heater, use thereof and method for preparing isocyanate using heater
Patent number
10,645,756
Issue date
May 5, 2020
Wanhua Chemical Group Co., Ltd.
Yong Yu
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Patents Applications
last 30 patents
Information
Patent Application
METHOD FOR PREPARING ISOPHORONE DIISOCYANATE
Publication number
20220002235
Publication date
Jan 6, 2022
WANHUA CHEMICAL GROUP CO., LTD.
Yong YU
C07 - ORGANIC CHEMISTRY
Information
Patent Application
Heater, Use Thereof And Method For Preparing Isocyanate Using Heater
Publication number
20170164424
Publication date
Jun 8, 2017
WANHUA CHEMICAL GROUP CO., LTD.
Yong Yu
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR