Longchun Cheng

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Hopewell, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and composition for inhibiting corrosion in aqueous systems
- Patent number 6,585,933
- Issue date Jul 1, 2003
- BetzDearborn, Inc.
- William C. Ehrhardt
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Inhibition of corrosion in aqueous systems
- Patent number 6,187,262
- Issue date Feb 13, 2001
- BetzDearborn Inc.
- Longchun Cheng
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Halogen resistant copper corrosion inhibitors
- Patent number 6,103,144
- Issue date Aug 15, 2000
- BetzDearborn Inc.
- Longchun Cheng
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Methods of inhibiting corrosion using isomers of chloro-methylbenzo...
- Patent number 5,968,408
- Issue date Oct 19, 1999
- BetzDearborn Inc.
- Sydia B. Anderson
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...