Ping Xu

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of manufacturing a polyimide-type gas permeation membrane in...
- Patent number 5,690,870
- Issue date Nov 25, 1997
- Nitto Denko Corporation
- Hisao Hachisuka
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Gas separating composite membrane and process for producing the same
- Patent number 5,647,894
- Issue date Jul 15, 1997
- Nitto Denko Corporation
- Tomomi Ohara
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Method for the separation and concentration of gas using a composit...
- Patent number 5,391,219
- Issue date Feb 21, 1995
- Nitto Denko Corporation
- Kenji Matsumoto
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Composite or asymmetric fluorine-containing polyimide membrane, a p...
- Patent number 5,178,940
- Issue date Jan 12, 1993
- Nitto Denko K.K.
- Kenji Matsumoto
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Composite or asymmetric fluorine-containing polyimide membrane, a p...
- Patent number 5,165,963
- Issue date Nov 24, 1992
- Nitto Denko Corporation
- Kenji Matsumoto
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...