TREA

Frederick Alan Hoffstadt

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  • Coraopolis, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Low fluid loss cementing compositions
    • Patent number 3,943,996
    • Issue date Mar 16, 1976
    • Calgon Corporation
    • Lawrence James Guilbault
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Low fluid loss cementing compositions
    • Patent number 3,931,096
    • Issue date Jan 6, 1976
    • Calgon Corporation
    • Lawrence James Guilbault
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES