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Thomas Engelhardt

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  • Rheinfelden, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method for optically brightening paper
    • Patent number 6,464,832
    • Issue date Oct 15, 2002
    • Ciba Specialty Chemicals Corporation
    • Thomas Engelhardt
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Method for optically brightening paper
    • Patent number 6,302,999
    • Issue date Oct 16, 2001
    • Ciba Specialty Chemicals Corp.
    • Thomas Engelhardt
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
  • Information Patent Grant

    Dispersions of fluorescent whitening agents
    • Patent number 5,976,410
    • Issue date Nov 2, 1999
    • Ciba Specialty Chemicals Corporation
    • Peter Rohringer
    • D21 - PAPER-MAKING PRODUCTION OF CELLULOSE

Patents Applicationslast 30 patents