Patents by Inventor Hauke Steinhardt

Hauke Steinhardt 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: 5437801
    Abstract: Aqueous emulsions which contain the fatty acid esters of N-methyl-N,N,N-trihydroxyethyl ammonium methyl sulfate as cationic tensides are suitable as fabric softeners. These fabric softener emulsions have the disadvantage, however, that emulsions with high concentrations can be handled only by means of dispersion agents. Therefore, an aqueous emulsion of fatty acid ester of N-methyl-N,N,N-trihydroxyethyl ammonium methyl sulfate is proposed which is stable in storage, and demonstrates an active substance content of more than 15% at a viscosity below 100 mPa.s at 25.degree. C. This emulsion can be used without any additional emulsifier. The emulsion according to the invention has quaternary ammonium compounds with 1.1 to 1.7 fatty acid groups, as a mean value.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: August 1, 1995
    Assignee: Huels Aktiengesellschaft
    Inventors: Harald Luders, Kurt Kosswig, Hauke Steinhardt
  • Patent number: 4963274
    Abstract: A fabric conditioner comprising 18 to 50% by weight of a mixture of at least two quaternary ammonium salt components (A) and (B) with the remainder of the conditioner being water and auxiliary agents.
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: October 16, 1990
    Assignee: Huels Aktiengesellschaft
    Inventors: Wulf Ruback, Jan Schut, Werner Friedrich, Heinz Riemer, Hauke Steinhardt