Patents by Inventor Johannes Peter Dix

Johannes Peter Dix 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).

  • Processes of treating leather and skins employing polymer compositions
    Patent number: 6336942
    Abstract: Aqueous solutions or aqueous emulsions of copolymers are obtainable by copolymerization of (a) from 20 to 95 mol % of at least one monoethylenically unsaturated C4-C12-dicarboxylic acid or the anhydride thereof with (b) from 5 to 80 mol % of at least one branched oligomer or polymer which has a vinyl, vinylidene or alkylvinylene terminal group and is of at least 9 carbon atoms and (c) from 0 to 50 mol % of at least one further monoethylenically unsaturated compound which is copolymerizable with the monomers (a) and (b) and contain from 0.5 to 70% by weight, based on the total amount of the solutions or emulsions, of these copolymers. These copolymer solutions or emulsions are suitable as leather assistants and as dispersants for pigments.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: January 8, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Danisch, Johannes Peter Dix, Walter Denzinger, Axel Kistenmacher, Michael Kneip, Hans-Joachim Müller, Joachim Rösch, Gunnar Schornick
  • Stable colorant compositions
    Patent number: 6080209
    Abstract: Stable aqueous dye compositions containing at least one anionic colorant and at least one pigment and a polyanionic thickening agent. The dye compositions may be used to dye leather.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: June 27, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Matthias Wiesenfeldt, Johannes Peter Dix, Rudolf Paulus, Manfred Herrmann
  • Dye mixtures containing polyazo dyes and CI Sulphur Black 1 dye
    Patent number: 5972050
    Abstract: Mixtures comprise the dye of the formula I ##STR1## the dye C.I. Sulphur Black 1 (53 185), at least one disazo dye of the formula II ##STR2## where the ring A, X.sup.1, R.sup.1, R.sup.2 and R.sup.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: October 26, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Matthias Wiesenfeldt, Johannes Peter Dix, Rolf Streicher, Manfred Herrmann, Gunther Lamm
  • Oligomeric triarylmethane dyes
    Patent number: 5750742
    Abstract: Triarylmethanes of the formula ##STR1## where m is from 1 to 100,L.sup.1 and L.sup.2 are each C.sub.2 -C.sub.4 -alkylene,R.sup.1 and R.sup.2 are each hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or halogen,R.sup.3 is hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl,R.sup.4, R.sup.5,R.sup.6 and R.sup.7 are each hydrogen, substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl, or substituted or unsubstituted phenyl,Q is aryl, andAn.sup..crclbar. is the equivalent of an anion,are useful for dyeing or printing polymeric material.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: May 12, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Gunter-Rudolf Schroder, Udo Mayer, Ulf Baus, Johannes Peter Dix