Wenchang Ji

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Doylestown, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Cold gas-dynamic spraying process
- Patent number 6,364,932
- Issue date Apr 2, 2002
- The BOC Group, Inc.
- Wenchang Ji
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Ozone purification process
- Patent number 6,197,091
- Issue date Mar 6, 2001
- The BOC Group, Inc.
- Wenchang Ji
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Ozone purification process
- Patent number 6,190,436
- Issue date Feb 20, 2001
- The BOC Group, Inc.
- Wenchang Ji
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Optical fiber cooling process
- Patent number 6,125,638
- Issue date Oct 3, 2000
- The BOC Group, Inc.
- Wenchang Ji
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Method and apparatus for purifying ammonia
- Patent number 6,065,306
- Issue date May 23, 2000
- The BOC Group, Inc.
- Wenchang Ji
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method of processing semiconductor manufacturing exhaust gases
- Patent number 6,017,382
- Issue date Jan 25, 2000
- The BOC Group, Inc.
- Wenchang Ji
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Process and apparatus for enriching ammonia
- Publication number 20050034479
- Publication date Feb 17, 2005
- The BOC Group
- Wenchang Ji
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
Helium recovery process
- Publication number 20020178913
- Publication date Dec 5, 2002
- Wenchang Ji
- C01 - INORGANIC CHEMISTRY