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Ralf Kehl
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Duesseldorf, DE
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last 30 patents
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Patent Grant
Process for working up ammoniacal metal solutions including treatin...
Patent number
6,045,763
Issue date
Apr 4, 2000
Henkel Kommanditgesellschaft auf Aktien
Ralf Kehl
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for the removal of impurity elements from solutions of valu...
Patent number
5,632,963
Issue date
May 27, 1997
Henkel Kommanditgesellschaft auf Aktien
Werner Schwab
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information
Patent Grant
Process for the two-phase extraction of metal ions from phases cont...
Patent number
5,260,039
Issue date
Nov 9, 1993
Hendel Kommanditgesellschaft auf Aktien
Werner Schwab
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for selective extraction of contaminant elements from mixtu...
Patent number
5,039,496
Issue date
Aug 13, 1991
Henkel Kommanditgesellschaft auf Aktien
Ralf Kehl
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Common separation of contaminating elements from electrolyte soluti...
Patent number
4,834,951
Issue date
May 30, 1989
Yokogawa Electric Corporation
Werner Schwab
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Use of citric acid partial esters for the extraction of iron
Patent number
4,820,417
Issue date
Apr 11, 1989
Henkel Kommanditgesellschaft auf Aktien
Willi Buchmeier
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...