TREA

Ulrich Welkener

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  • Chester, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Enhancement of fluorescent whitening agents: water-soluble phosphon...
    • Patent number 5,266,078
    • Issue date Nov 30, 1993
    • W. R. Grace & Co.-Conn.
    • Ulrich Welkener
    • D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
  • Information Patent Grant

    Creping aid
    • Patent number 5,234,547
    • Issue date Aug 10, 1993
    • W. R. Grace & Co.-Conn.
    • Paul Knight
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE