Dyes with an unsaturated C on the N atom attached to the nucleus

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    Pleochroic dyes and electro-optical displays therewith

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    • Issue date Oct 27, 1987
    • Minnesota Mining and Manufacturing Company
    • William A. Huffman
    • G02 - OPTICS
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    Liquid crystals having pleochroic dyes

    • Patent number 4,402,854
    • Issue date Sep 6, 1983
    • Siemens Aktiengesellschaft
    • Alexander Moeller
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    Anthraquinone-azomethine compounds, processes for their preparation...

    • Patent number 4,389,215
    • Issue date Jun 21, 1983
    • Bayer Aktiengesellschaft
    • Rutger Neeff
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    Liquid crystals having pleochroic dyes

    • Patent number 4,363,743
    • Issue date Dec 14, 1982
    • Siemens Aktiengesellschaft
    • Alexander Moeller
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    • Patent number 4,323,671
    • Issue date Apr 6, 1982
    • Bayer Aktiengesellschaft
    • Rutger Neeff
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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    Anthraquinone-azomethine compounds, processes for their preparation...

    • Patent number 4,323,670
    • Issue date Apr 6, 1982
    • Bayer Aktiengesellschaft
    • Rutger Neeff
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    Anthraquinone-azomethine compounds, processes for their preparation...

    • Patent number 4,319,025
    • Issue date Mar 9, 1982
    • Bayer Aktiengesellschaft
    • Rutger Neeff
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    • Issue date Jan 5, 1982
    • Bayer Aktiengesellschaft
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    • D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
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    Anthraquinone derivatives for pigmenting organic macromolecular sub...

    • Patent number 4,284,411
    • Issue date Aug 18, 1981
    • Bayer Aktiengesellschaft
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    Anthraquinone amino pleochroic dyes

    • Patent number 4,154,746
    • Issue date May 15, 1979
    • Minnesota Mining and Manufacturing Company
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    3769013

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    3679420

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    3654319

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    3626009

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    • C07 - ORGANIC CHEMISTRY
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    3577444

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    3560491

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    3188316

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    3073851

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    2888379

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    2028141

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    1881697

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    1803395

    • Patent number 1,803,395
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Patents Applicationslast 30 patents

  • Information Patent Application

    CONTACT LENS

    • Publication number 20220075210
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    • COOPERVISION INTERNATIONAL LIMITED
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