TREA

Elizabeth G. Varney

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  • Levittown, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bleaching aid
    • Patent number 3,956,165
    • Issue date May 11, 1976
    • Betz Laboratories, Inc.
    • Gerald D. Hansen
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE