TREA

Hans-George Nieder-Vahrenholz

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  • Cologne, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method for manufacturing alkali chromates from chromium ore
    • Patent number 5,505,918
    • Issue date Apr 9, 1996
    • Bayer Aktiengesellschaft
    • Uwe Arndt
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    Disintegration of chromites
    • Patent number 4,500,350
    • Issue date Feb 19, 1985
    • Bayer Aktiengesellschaft
    • Johann-Nikolaus Meussdoerffer
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Disintegration of silica-rich chromite
    • Patent number 4,112,046
    • Issue date Sep 5, 1978
    • Bayer Aktiengesellschaft
    • Hans Niederprum
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...