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Rolf Kola

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  • W-Dusseldorf, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Removal of zinc from phosphating process sludges
    • Patent number 5,198,020
    • Issue date Mar 30, 1993
    • Metallgesellschaft Aktiengesellschaft
    • Wolfgang Fennemann
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...