Zhenghua Yang

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Changchun, CN

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Patents Grantslast 30 patents

Information Patent Grant
Process for the preparation of 3,3',4,4'-biphenyltetracarboxylic ac...
- Patent number 5,081,281
- Issue date Jan 14, 1992
- Changchun Institute of Applied Chemistry
- Mengxian Ding
- C07 - ORGANIC CHEMISTRY