Inventor
DUAN QINGHUA
CN7 patents
⚠️ This page may combine multiple inventors who share the name “DUAN QINGHUA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CHINA PETROLEUM & CHEM CORP
6 patentsUS9512380B2Dec 6, 2016
Hindered phenol compound, preparation thereof and use thereof as an antioxidant
CHINA PETROLEUM & CHEM CORP6 citations71
US11028334B2Jun 8, 2021
Gradient copolymer, its production and application thereof
CHINA PETROLEUM & CHEM CORP0 citations50
US10968313B2Apr 6, 2021
Amine polymer and preparation method and use thereof
CHINA PETROLEUM & CHEM CORP0 citations47
US9593290B2Mar 14, 2017
Lubricating oil composition and production thereof
CHINA PETROLEUM & CHEM CORP0 citations47
US9587198B2Mar 7, 2017
Mannich base, production and use thereof
CHINA PETROLEUM & CHEM CORP0 citations42
US10822359B2Nov 3, 2020
Benzotriazole derivative, preparation process and the use thereof
CHINA PETROLEUM & CHEM CORP0 citations38