TREA

Rudolf Siebert

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  • Freiberg, DD
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Patents Grantslast 30 patents

  • Information Patent Grant

    Process for the preparation of pure aluminum oxide
    • Patent number 4,224,287
    • Issue date Sep 23, 1980
    • VEB Mansfeld Kombinat Wilhelm Pieck
    • Siegfried Ziegenbalg
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...