Hailing Duan

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Allendale, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for removing silver in the presence of iron from waste effl...
- Patent number 6,126,840
- Issue date Oct 3, 2000
- Fuji Hunt Photographic Chemicals, Inc.
- Hailing Duan
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Method for removing metal ions and/or complexes containing metal io...
- Patent number 5,993,668
- Issue date Nov 30, 1999
- Fuji Hunt Photographic Chemicals, Inc.
- Hailing Duan
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Apparatus for removing metal ions and/or complexes containing metal...
- Patent number 5,728,295
- Issue date Mar 17, 1998
- Fuji Hunt Photographic Chemicals, Inc.
- Hailing Duan
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE