TREA

Qiwei Yang

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  • Zurich, CH
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Patents Grantslast 30 patents

  • Information Patent Grant

    Concrete curing admixtures
    • Patent number 5,925,699
    • Issue date Jul 20, 1999
    • MBT Holding AG
    • Peter Ellenberger
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Production of cement-mortar dry mix
    • Patent number 5,322,562
    • Issue date Jun 21, 1994
    • Sandoz Ltd.
    • Peter Ellenberger
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Dry mixture for epoxy cement concrete
    • Patent number 5,252,636
    • Issue date Oct 12, 1993
    • Sandoz Ltd.
    • Peter Ellenberger
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES