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Keiji Toyabe

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Patents Grantslast 30 patents

  • Information Patent Grant

    Process for recovering valuable metal from waste catalyst
    • Patent number 5,431,892
    • Issue date Jul 11, 1995
    • Sumitomo Metal Mining Co., Ltd.
    • Keiji Toyabe
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Process for dissolving used catalyst
    • Patent number 5,415,849
    • Issue date May 16, 1995
    • Sumitomo Metal Mining Company Limited
    • Keiji Toyabe
    • B09 - DISPOSAL OF SOLID WASTE RECLAMATION OF CONTAMINED SOIL SOIL