Patents by Inventor Heinrich Helling

Heinrich Helling has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4078885
    Abstract: A stable, liquid, aqueous dyeing composition consisting of (a) 3 to 25 percent by weight of at least one fibre-reactive dyestuff of the formula(HO.sub.3 S).sub.m --F--Z.sub.nin which F represents the radical of a dyestuff chromophore of an anthraquinone-, monoazo-, disazo-, trisazo- or phthalocyanine dyestuff, Z represents a fibre-reactive group, m stands for an integer from 1 to 6 and n stands for an integer from 1 to 3, (b) 3 to 25 percent by weight of at least one disperse dyestuff, (c) 0.5 to 5 percent by weight of a buffer substance, (d) 3 to 40 percent by weight of a dispersing agent, wetting agent, antifreezing agent or preservative or mixtures thereof, and (e) water, and having a pH value between 4 and 7, said dyeing compositions being suitable for the dyeing or printing of blends of fibres containing on the one hand wool, silk, fibres of native or regenerated cellulose, and on the other hand synthetic polyamide, polyacrylonitrile or linear polyesterfibres.
    Type: Grant
    Filed: June 22, 1976
    Date of Patent: March 14, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Konrad Opitz, Heinrich Helling