Wei Wan

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Oil-based viscosifier of drilling fluid and the preparation method...
- Patent number 9,410,071
- Issue date Aug 9, 2016
- CHINA UNIVERSITY OF PETROLEUM (BEIJING)
- Guancheng Jiang
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...