Ou Li

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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