TREA

Mark A. Berggren

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  • Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Torchable roll roofing membrane
    • Patent number 5,308,676
    • Issue date May 3, 1994
    • Shell Oil Company
    • Richard Gelles
    • D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
  • Information Patent Grant

    Modification of asphalt
    • Patent number H1250
    • Issue date Nov 2, 1993
    • Shell Oil Company
    • Dennis W. Gilmore
    • 524 - Synthetic resins or natural rubbers
  • Information Patent Grant

    Asphalt-block copolymer roofing composition
    • Patent number H1141
    • Issue date Feb 2, 1993
    • Shell Oil Company
    • Richard Gelles
    • 524 - Synthetic resins or natural rubbers