TREA

Frank J. Steffes

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  • Camas, WA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Apparatus for selective sorting of material chips
    • Patent number 4,452,694
    • Issue date Jun 5, 1984
    • Black Clawson, Inc.
    • Elmer Christensen
    • B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
  • Information Patent Grant

    Process for making fibers
    • Patent number 4,054,625
    • Issue date Oct 18, 1977
    • Crown Zellerbach Corporation
    • John H. Kozlowski
    • D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
  • Information Patent Grant

    Selective delamination of wood chips
    • Patent number 4,050,980
    • Issue date Sep 27, 1977
    • Crown Zellerbach Corporation
    • Fred L. Schmidt
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE