Patents by Inventor Hildegard van Delden

Hildegard van Delden 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).

  • Use of water-soluble polymers and polyhydroxymono- or dicarboxylates in the bleaching of textiles
    Patent number: 5704947
    Abstract: The deposition of magnesium and calcium silicate in the bleaching of textiles with peroxides is prevented by contacting the textiles with a bleaching composition that is free from phosphorous and contains water-soluble polymers containing sulfonate and carboxylate groups, and polyhydroxymono- or dicarboxylates.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: January 6, 1998
    Inventors: Heribert Kaiser, Christian Nitsch, Claus-Peter Kurzendoerfer, Bernd Wahle, Bernd-Dieter Baehr, deceased, Sylvia Baehr, executrix, Hildegard Van Delden
  • Silicate- and magnesium-free stabilizer hydrogen peroxide mixtures for bleaching processes
    Patent number: 4959075
    Abstract: Silicate- and magnesium-free stabilizer mixtures for stabilizing aqueous peroxide bleaching baths based on organic acids and/or salts thereof comprising:(A) polyhydroxy and/or hydroxycarboxylic acids, and their alkali metal and/or ammonium salts;(B) polyacrylic acids, and their partially neutralized form; and(C) polyamine and/or amine polyphosphonic acids, and their alkali metal and/or ammonium salts;with the proviso that the ratio by weight of components A: B: C is 1 to 6: 0.2 to 1: 0.4 to 4.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: September 25, 1990
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Bernd D. Baehr, Ulrich Rall, Hildegard van Delden, Wolfgang Lillotte
  • Silicate-and magnesium-free stabilizer mixtures
    Patent number: 4880566
    Abstract: Silicate- and magnesium-free stabilizer mixtures for stabilizing aqueous peroxide bleaching baths based on organic acids and/or salts thereof comprising:(A) polyhydroxy and/or hydroxycarboxylic acids, and their alkali metal and/or ammonium salts;(B) polyacrylic acids, and their partially neutralized form; and(C) polyamine and/or amine polyphosphonic acids, and their alkali metal and/or ammonium salts;(D) 35% hydrogen peroxide solution with the proviso that the ratio by weight of components A:B:C is 1 to 6:0.2 to 1:0.4 to 4.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: November 14, 1989
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Bernd D. Baehr, Ulrich Rall, Hildegard van Delden, Wolfgang Lillotte
  • Ether sulfonates as low-foam wetting agents
    Patent number: 4612142
    Abstract: Ether sulfonates corresponding to the following general formulaR.sup.1 -- O(C.sub.n H.sub.2n O).sub.x --R.sup.2 --SO.sub.3 M (I)wherein R.sup.1 is a C.sub.1-6 alkyl, n is an integer of 2-4, x is an integer from 0-30, R.sup.2 is a C.sub.6-22 linear alkenylene, hydroxyalkylene or hydroxyalkenylene group, and M is hydrogen or an alkali metal cation, which can be obtained by sulfonation of olefinically unsaturated fatty alkyl lower alkyl ethers or fatty alkyl (polyoxyalkyl) lower alkyl ethers with sulfur trioxide and hydrolysis of the sultones formed, are particularly suitable for use as low-foam wetting agents in aqueous acidic or alkaline commercial-grade treatment preparations.
    Type: Grant
    Filed: September 5, 1985
    Date of Patent: September 16, 1986
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Robert Piorr, Hildegard van Delden, Sabine Luttge, Bernd Bahr, Ingo Wegener