TREA

Gerald R. Petrey

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  • Pittsburgh, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Lithoplate and method for making same
    • Patent number 5,186,767
    • Issue date Feb 16, 1993
    • Aluminum Company of America
    • Elwin L. Rooy
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Method for making lithoplate
    • Patent number 4,902,353
    • Issue date Feb 20, 1990
    • Aluminum Company of America
    • Elwin L. Rooy
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Method for making lithoplate
    • Patent number 4,818,300
    • Issue date Apr 4, 1989
    • Aluminum Company of America
    • Elwin L. Rooy
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...