TREA

Helena Twardowska

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  • Mississauga, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Preparation of phosphorous acid
    • Patent number 4,980,142
    • Issue date Dec 25, 1990
    • Tenneco Canada Inc.
    • James D. McGilvery
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    Stabilization of red phosphorus
    • Patent number 4,489,183
    • Issue date Dec 18, 1984
    • Erco Industries Limited
    • Helena Twardowska
    • C01 - INORGANIC CHEMISTRY
  • Information Patent Grant

    Stabilization of red phosphorus
    • Patent number 4,421,728
    • Issue date Dec 20, 1983
    • Erco Industries Limited
    • Helena Twardowska
    • C01 - INORGANIC CHEMISTRY