Zhengfeng Zhang

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Shanghai, CN

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Patents Grantslast 30 patents

Information Patent Grant
Process for preparation of highly pure, non-yellowing methacrylic acid
- Patent number 9,290,431
- Issue date Mar 22, 2016
- Evonik Rohm GmbH
- Zhengfeng Zhang
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing a photochromic polymeric composition, thus ob...
- Patent number 8,277,700
- Issue date Oct 2, 2012
- Evonik Roehm GmbH
- Zhengfeng Zhang
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
PREPARATION PROCESS FOR SOLID ACRYLIC RESIN SUITABLE FOR UV PHOTOCU...
- Publication number 20230002521
- Publication date Jan 5, 2023
- PIONEER CHEMICALS (YANGZHOU) CO., LTD
- Wei XIA
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
PROCESS FOR PREPARATION OF HIGHLY PURE, NON-YELLOWING METHACRYLIC ACID
- Publication number 20150126777
- Publication date May 7, 2015
- Evonik Industries AG
- Zhengfeng Zhang
- C07 - ORGANIC CHEMISTRY
Information Patent Application
Process for preparing a photochromic polymeric composition, thus ob...
- Publication number 20120085980
- Publication date Apr 12, 2012
- Evonik Roehm GmbH
- Zhengfeng ZHANG
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
PROCESS FOR PREPARING A PHOTOCHROMIC POLYMERIC COMPOSITION, THUS OB...
- Publication number 20110260125
- Publication date Oct 27, 2011
- Evonik Roehm GmbH
- Zhengfeng Zhang
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
DISPERSION COMPRISING INORGANIC PARTICLES, WATER, AND AT LEAST ONE...
- Publication number 20100168282
- Publication date Jul 1, 2010
- Evonik Roehm GmbH
- Patrick Becker
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES