Kejian Yao

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Hangzhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Combined packing-tray in a vapor-liquid contacting tower and a proc...
- Patent number 6,345,811
- Issue date Feb 12, 2002
- China Petro-Chemical Corporation
- Xiaomei Yu
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Retangular suspending downcomer directing tray
- Patent number 6,299,146
- Issue date Oct 9, 2001
- China Petro-Chemical Corp.
- Xiaomei Yu
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Gas-liquid contact tray with fixed valves for mass transfer
- Publication number 20050280169
- Publication date Dec 22, 2005
- CHINA PETROLEUM & CHEMICAL CORPORATION
- Kejian Yao
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL