Patents by Inventor Stefan Stein

Stefan Stein 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: 6036962
    Abstract: The present invention relates to the use of polyamides in cosmetics which carry sulfonate groups and are obtainable fromA.sub.1) from 0 to 19.9 mol-% of at least one monoaminocarboxylic acid having 2 to 12 carbon atoms, its lactam, or monoaminocarboxylic acid/lactam mixtures,A.sub.2) from 40.05 to 50 mol-% of at least one diamine having 2 to 18 carbon atoms,A.sub.3) from 0.5 to 49.5 mol-% of at least one dicarboxylic acid having 4 to 12 carbon atoms which carries sulfonate groups, andA.sub.4) from 0.5 to 49.5 mol-% of at least one further dicarboxylic acid having 2 to 16 carbon atoms, and cosmetic compositions containing said polyamides.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: March 14, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Muller, Stefan Stein, Jorg Breitenbach, Axel Sanner, Karin Sperling
  • Patent number: 6025317
    Abstract: Porous polymers which are in powder form and contain N-vinylimidazole units and which are obtainable by free-radical precipitation polymerization ofa) 5-100% by weight of at least one N-vinylimidazole of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are identical or different and are H, C.sub.1 -C.sub.4 -alkyl, N-vinylaxazolidone, N-vinyltriazole, 4-vinylpyridine N-oxide or mixtures of said monomers,b) 0-95% by weight of other copolymerizable monoethylenically unsaturated monomers andc) 0-50% by weight of at least one monomer with at least two non-conjugated ethylenic double bonds in aqueous solution which contains 0.5-30% by weight of at least one electrolyte and, based on the monomers employed, 0.5-80% by weight of at least one surfactant, a process of the preparation thereof, and the use of the porous polymers.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: February 15, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Stefan Stein, Dieter Boeckh, Christian Schade, Gerhard Rossler
  • Patent number: 5962613
    Abstract: Water-soluble copolymers which are obtainable by free-radical solution polymerization ofa) 10-99.5% by weight of at least one vinylimidazole of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are identical or different and are H, C.sub.1 -C.sub.4 -alkyl, monomers of the formula ##STR2## where R.sup.4 and R.sup.5 are identical or different and are H, C.sub.1 -C.sub.4 -alkyl or together form a ring of 3 to 5 methylene groups,N-vinyloxazolidone, N-vinyltriazole, 4-vinylpyridine N-oxide or mixtures of said monomers,b) 0-89.5% by weight of other copolymerizable monoethylenically unsaturated monomers andc) 0.5-30% by weight of at least one monomer which acts as crosslinker and has at least two non-conjugated ethylenic double bondsin water and/or polar organic solvents in the presence of polymerization regulators, using from 0.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: October 5, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Christian Schade, Jurgen Detering, Stefan Stein, Dieter Boeckh, Hans-Ulrich Jager
  • Patent number: 5846524
    Abstract: The use of sulfonate-bearing polyamides which are obtainable fromA.sub.1) from 20 to 99 mol % of a monoaminocarboxylic acid having 2 to 12 C atoms or its lactam,A.sub.2) from 0.5 to 40 mol % of a diamine having 2 to 18 C atoms,A.sub.3) from 0.5 to 25 mol % of a sulfonate-bearing dicarboxylic acid having 4 to 12 C atoms, andA.sub.4) from 0 to 35 mol % of a further dicarboxylic acid having 2 to 16 C atoms,as film-forming agents in hairsetting compositions is described.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: December 8, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Jorg Breitenbach, Herbert Fisch, Stefan Stein, Axel Sanner, Karin Sperling-Vietmeier
  • Patent number: 5800803
    Abstract: An oral composition and method for use thereof, comprising in an orally acceptable vehicle, an effective antiplaque amount of a noncationic antibacterial agent, and an anionic copolymer formed from monomers of which about 40 to about 90% by weight are hydrophilic type capable of attachment to oral surfaces and about 10 to about 60% by weight are of a hydrophobic type; such oral composition being effective in increasing the uptake of the antibacterial compound to dental tissue so as to enhance the therapeutic efficacy of the administered antibacterial compound.
    Type: Grant
    Filed: February 10, 1997
    Date of Patent: September 1, 1998
    Assignee: Colgate-Palmolive Company
    Inventors: Yelloji Rao K. Mirajkar, Abdul Gaffar, Stefan Stein, Ekkehard Jahns, Reinhold Dieing, Karin Sperling