TREA

Hermann Doerr

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  • Muelheim, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Process for the production of ferrochromium
    • Patent number 4,629,506
    • Issue date Dec 16, 1986
    • Fried.Krupp Gesellschaft mit beschraenkter Haftung
    • Klaus Ulrich
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Process for the production of ferromanganese
    • Patent number 4,576,638
    • Issue date Mar 18, 1986
    • Fried. Krupp Gesellschaft mit beschraenkter Haftung
    • Hermann Doerr
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...