Shiyi Yuan

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Betaine surfactants and preparation methods and uses thereof
- Patent number 9,540,559
- Issue date Jan 10, 2017
- PetroChina Company Limited
- Chunde Liu
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Braided comb-shaped salt-resistant polymer thickening agent
- Patent number 7,304,116
- Issue date Dec 4, 2007
- PetroChina Company Limited
- Shiyi Yuan
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents

Information Patent Application
BETAINE SURFACTANTS AND PREPARATION METHODS AND USES THEREOF
- Publication number 20140113842
- Publication date Apr 24, 2014
- Petrochina Company Limited
- Chunde Liu
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
Braided comb-shaped salt-resistant polymer thickening agent
- Publication number 20060287456
- Publication date Dec 21, 2006
- Petrochina Company Limited
- Shiyi Yuan
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...