Patents by Inventor Erwin Ungermann

Erwin Ungermann 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: 4198204
    Abstract: Process for dyeing mesh fabrics and woven fabrics, made from cellulose fibers and mixed yarns thereof, in rope form on a winch beck or jet dyeing apparatus by the exhaustion method at a short liquor ratio in the presence of at least one auxiliary, using an aqueous liquor containing dyes or dye precursors which are suitable for the type of fiber and optionally fixing chemicals, wherein dyeing is carried out at a liquor ratio of 1:3 to 1:8 (on the weight of the dry goods) and 2-8 g/l of an anionic or non-ionic, aliphatic softener are used, on its own or as a mixture, as the auxiliary.
    Type: Grant
    Filed: November 22, 1977
    Date of Patent: April 15, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Ulrich von der Eltz, Joachim W. Lehmann, Erwin Ungermann, Edwin Humuller, Karl-Heinz Keil, Joachim Ribka
  • Patent number: 4078884
    Abstract: Liquid aqueous dyeing preparations of fiber-reactive dyestuffs consisting ofA. a total of from 5 to 35 percent by weight of the two dyestuffs corresponding in the form of the free acids to the formulae (I) and (II) ##STR1## b. from 1 to 5 percent by weight of buffer substances not capable of being reacted chemically with the fiber-reactive grouping of the said dyestuffs, andC. from 94 to 60 percent by weight of water, and having a pH-value between 3 and 7,Said dyeing preparations being suitable for the dyeing or printing of wool, silk, fibrous materials consisting of polyamides, native or regenerated cellulose or blends of fibers containing one or more of the said fibrous materials.
    Type: Grant
    Filed: November 18, 1975
    Date of Patent: March 14, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Konrad Opitz, Ludwig Schlafer, Erwin Ungermann