Inventor · disambiguated record
Ralf Kehl
Also filed as: KEHL RALF
6 granted patents·93 citations·filing 1987–1996
83Inventor score
Top patents by PatentIndex Score
6 records- 0183US5632963AProcess for the removal of impurity elements from solutions of valuable metalsHENKEL KGAA·Filed 1993·Granted May 27, 1997·44 cites·33 claims
- 0266US5039496AProcess for selective extraction of contaminant elements from mixtures of electrolytes in solutionHENKEL KGAA·Filed 1989·Granted Aug 13, 1991·17 cites·21 claims
- 0347US4834951ACommon separation of contaminating elements from electrolyte solutions of valuable metalsHENKEL KG·Filed 1987·Granted May 30, 1989·15 cites·40 claims
- 0444US5260039AProcess for the two-phase extraction of metal ions from phases containing solid metal oxides, agents and the use thereofHENDEL KOMMANDITGESELLSCHAFT A·Filed 1990·Granted Nov 9, 1993·8 cites·20 claims
- 0543US6045763AProcess for working up ammoniacal metal solutions including treating the wash water with an organic extraction solutionHENKEL KGAA·Filed 1996·Granted Apr 4, 2000·6 cites·12 claims
- 0637US4820417AUse of citric acid partial esters for the extraction of ironHENKEL KGAA·Filed 1988·Granted Apr 11, 1989·3 cites·16 claims
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