Inventor · disambiguated record
Qinghua Duan
Also filed as: DUAN QINGHUA
7 granted patents·3 pending applications·6 citations·filing 2007–2021
71Inventor score
Top patents by PatentIndex Score
10 records- 0189US9512380B2Hindered phenol compound, preparation thereof and use thereof as an antioxidantCHINA PETROLEUM & CHEM CORP·Filed 2014·Granted Dec 6, 2016·6 cites·18 claims
- 0258US9593290B2Lubricating oil composition and production thereofCHINA PETROLEUM & CHEM CORP·Filed 2013·Granted Mar 14, 2017·0 cites·14 claims
- 0356US2023167204A1Apparatus and method for preparing poly-alpha-olefinCHINA PETROLEUM & CHEM CORP·Filed 2021·Application pending·0 cites
- 0454US9587198B2Mannich base, production and use thereofCHINA PETROLEUM & CHEM CORP·Filed 2013·Granted Mar 7, 2017·0 cites·13 claims
- 0551US2023211309A1Device and method for preparing polyalphaolefinCHINA PETROLEUM & CHEM CORP·Filed 2021·Application pending·0 cites
- 0648US2023012456A1Ester compound and preparation method therefor and uses thereofCHINA PETROLEUM & CHEM CORP·Filed 2020·Application pending·0 cites
- 0744US10822359B2Benzotriazole derivative, preparation process and the use thereofCHINA PETROLEUM & CHEM CORP·Filed 2017·Granted Nov 3, 2020·0 cites·10 claims
- 0842US10968313B2Amine polymer and preparation method and use thereofCHINA PETROLEUM & CHEM CORP·Filed 2016·Granted Apr 6, 2021·0 cites·16 claims
- 0942US8697616B2Organic molybdenum additive, its preparation method, a lubricating composition containing said additive, and use of the sameXU WEI·Filed 2007·Granted Apr 15, 2014·0 cites·27 claims
- 1039US11028334B2Gradient copolymer, its production and application thereofCHINA PETROLEUM & CHEM CORP·Filed 2017·Granted Jun 8, 2021·0 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →