William C. Ehrhardt

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Hamilton, 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 5,871,691
- Issue date Feb 16, 1999
- BetzDearborn Inc.
- William S. Carey
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Methods and compositions for inhibiting corrosion
- Patent number 5,866,042
- Issue date Feb 2, 1999
- BetzDearborn Inc.
- Jen-Chi Chen
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE