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Jeffrey H. Yen
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Woolwich, NJ, US
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last 30 patents
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Patent Grant
Hot lime precipitation of arsenic from wastewater or groundwater
Patent number
5,378,366
Issue date
Jan 3, 1995
Elf Atochem North America, Inc.
Jeffrey H.-G. Yen
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Process for removing heavy metals from aqueous solutions
Patent number
5,348,662
Issue date
Sep 20, 1994
Elf Atochem North America, Inc.
Jeffrey H. Yen
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Sulfide precipitation of heavy metals from aqueous solutions
Patent number
5,338,460
Issue date
Aug 16, 1994
Elf Atochem North America, Inc.
Jeffrey H. Yen
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for removing sulfur from organic sulfides
Patent number
5,312,992
Issue date
May 17, 1994
Elf Atochem North America, Inc.
Roger T. Clark
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Multiple-stage precipitation process for heavy metals in aqueous so...
Patent number
5,262,063
Issue date
Nov 16, 1993
Elf Atochem North America, Inc.
Jeffrey H. Yen
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Process for removing sulfur from organic polysulfides
Patent number
5,242,672
Issue date
Sep 7, 1993
Elf Atochem North America, Inc.
Jeffrey H. Yen
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Apparatus for removing sulfur from organic polysulfides
Patent number
4,855,113
Issue date
Aug 8, 1989
Pennwalt Corporation
Jeffrey H. Yen
C07 - ORGANIC CHEMISTRY