Patents by Inventor Kristin Tiefensee

Kristin Tiefensee 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).

  • Publication number: 20020192167
    Abstract: Use of sunscreen combinations which comprise, as essential constituent, 2-(4-alkoxyanilinomethylene)malonic dialkyl esters as photostable UV filters in cosmetic and pharmaceutical preparations
    Type: Application
    Filed: March 12, 2002
    Publication date: December 19, 2002
    Inventors: Thomas Heidenfelder, Kristin Tiefensee, Thomas Wunsch
  • Patent number: 6488915
    Abstract: Use of sunscreen combinations which comprise, as essential constituent, 2-(4-alkoxyanilinomethylene)malonic dialkyl esters as photostable UV filters in cosmetic and pharmaceutical preparations A) compound absorbing essentially in the UV-A region and B) further compounds absorbing in the UV-A region, in the UV-B region and over both regions,  where the constituent absorbing in the UV-A region consists of A) effective amounts of at least one of the compounds of the formula I  in which the substituents R1 to R3, independently of one another, are C1-C8-alkyl as photostable UV filters in cosmetic and pharmaceutical preparations for protecting human skin and human hair against solar rays.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: December 3, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Heidenfelder, Kristin Tiefensee, Thomas Wünsch
  • Patent number: 6489422
    Abstract: Use of neutralized or partially neutralized copolymers obtainable from A) from 50 to 99% by weight of monoethylenically unsaturated carboxylic acid and B) from 1 to 50% by weight of at least one comonomer chosen from the groups a) to d) or also mixtures of different monomers from groups a) to d) a) monoethylenically unsaturated carboxylic acid esters with a saturated C8- to C30-alcohol b) N-alkyl- or N,N-dialkyl-substituted carboxamides, the alkyl radicals independently of one another being aliphatic or cycloaliphatic alkyl radicals having at least 8 to 18 carbon atoms, c) vinyl esters of aliphatic C8- to C30-carboxylic acids, d) C8- to C18-alkyl vinyl ethers, for the preparation of hair cleansers.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: December 3, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Meffert, Kristin Tiefensee
  • Patent number: 6458342
    Abstract: Sunscreen combinations which comprise A) effective amounts of a compound of formula I  and B) effective amounts of one or more compounds selected from a group consisting of: zinc oxide, titanium oxide and the compounds of formulae II to XVI which are specified in the description, are suitable as photostable UV filters in cosmetic and pharmaceutical compositions for protecting human skin or human hair against solar rays. The combinations are optionally used together with other conventional UV absorbing ingredients which are known per se for cosmetic and pharmaceutical compositions.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: October 1, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Heidenfelder, Kristin Tiefensee, Thomas Wünsch
  • Publication number: 20020132886
    Abstract: Use of neutralized or partially neutralized copolymers obtainable from
    Type: Application
    Filed: March 14, 2002
    Publication date: September 19, 2002
    Inventors: Helmut Meffert, Kristin Tiefensee
  • Patent number: 6444785
    Abstract: A process is provided for preparing W/O emulsions having crosslinked water-swollen polymers dispersed therein, by aftertreatment with a redox initiator system to reduce the residual monomer content.
    Type: Grant
    Filed: March 7, 2000
    Date of Patent: September 3, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Gotsche, Claudia Wood, Kristin Tiefensee
  • Patent number: 6399679
    Abstract: Use of neutralized or partially neutralized copolymers obtainable from A) from 50 to 99% by weight of monoethylenically unsaturated carboxylic acid and B) from 1 to 50% by weight of at least one comonomer chosen from the groups a) to d) or also mixtures of different monomers from groups a) to d) a) monoethylenically unsaturated carboxylic acid esters with a saturated C8- to C30-alcohol b) N-alkyl- or N,N-dialkyl-substituted carboxamides, the alkyl radicals independently of one another being aliphatic or cycloaliphatic alkyl radicals having at least 8 to 18 carbon atoms, c) vinyl esters of aliphatic C8- to C30-carboxylic acids, d) C8- to C18-alkyl vinyl ethers, for the preparation of hair cleansers.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: June 4, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Meffert, Kristin Tiefensee
  • Patent number: 6197283
    Abstract: W/O emulsions comprising dispersed therein crosslinked, water-swellable polymers consisting of a) 35-100% by weight of ionic monomers, b) 0-65% by weight of nonionic monomers, c) 0.3-1 mol-%, based on a) and b), of at least one at least bifunctional monomer, where the oil phase consists of one or more fatty acid esters, are used as thickeners in cosmetic or pharmaceutical formulations.
    Type: Grant
    Filed: April 4, 2000
    Date of Patent: March 6, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Kristin Tiefensee, Volker Schehlmann, Martin Rübenacker
  • Patent number: 6165971
    Abstract: The present invention relates to the use of amides of polymerized fatty acids as thickeners.Moreover, the invention relates to aqueous compositions comprising these amides as thickeners.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: December 26, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Knut Oppenlander, Michael Zirnstein, Kristin Tiefensee, Gunter Oetter
  • Patent number: 6099829
    Abstract: The present invention relates to a W/O emulsion comprising cross-linked, water-swellable polymers consisting ofa) 35-100% by weight of ionic monomers,b) 0-65% by weight of non-ionic monomers,c) 0.3-1 mol-%, based on a) and b), of one or more at least bifunctional monomer.The oil phase of the W/O emulsion consists of polyglycerol fatty acid esters and comprises at least one fatty acid ester of diglycerol or triglycerol with caprylic or capric acid. The W/O emulsions are usefull as thickeners for cosmetic or pharmaceutical compositions.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: August 8, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Kristin Tiefensee, Volker Schehlmann, Martin Rubenacker
  • Patent number: 6087449
    Abstract: The thermoplastic molding material contains a mixture of(A) from 10 to 60% by weight of a methyl methacrylate polymer,(B) from 10 to 70% by weight of a copolymer of a vinyl aromatic monomer and vinyl cyanide(C) from 15 to 50% by weight of a graft copolymer obtainable from a core (C1) comprising a 1,3-diene and a vinyl aromatic monomer, a first graft shell (C2) comprising a vinyl aromatic monomer, a C.sub.1 -C.sub.8 -alkyl ester of methacrylic acid and a crosslinking monomer and a second graft shell (C3) comprising a C.sub.1 -C.sub.8 -alkyl ester of methacrylic acid and a C.sub.1 -C.sub.8 -alkyl ester of acrylic acid, and(D) if required, conventional additives,the stated percentages of A, B and C in the mixture summing to 100% by weight.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: July 11, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Kristin Tiefensee, Rainer Neumann
  • Patent number: 6066334
    Abstract: Redispersible polymer powders or polymer granules consisting ofa) 10-95% by weight of polyvinyl acetate,b) 5-90% by weight of an N-vinylpyrrolidone-containing polymer,c) 0-20% by weight of another water-soluble or water-swellable substance andd) 0-20% by weight of a water-insoluble dusting agent with or withoute) other additives,are used as binders for producing solid pharmaceutical presentations, where the binder content in the presentation is from 0.5 to 20% by weight.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: May 23, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl Kolter, Kristin Tiefensee, Katrin Zeitz
  • Patent number: 6046277
    Abstract: The use of redispersible polymer powders or polymer granules for coating pharmaceutical or agrochemical use forms, consisting ofa) 10-95% by weight of polyvinyl acetate,b) 5-90% by weight of an N-vinylpyrrolidone-containing polymer,c) 0-20% by weight of another water-soluble or water-swellable substance andd) 0-20% by weight of a water-insoluble dusting agent with or withoute) other additives.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: April 4, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl Kolter, Kristin Tiefensee, Reinhold Stadler, Katrin Zeitz
  • Patent number: 5969042
    Abstract: Thermoplastic molding materials contain a mixture of(A) a methacrylate polymer,(B) a copolymer of vinylaromatic monomers and vinyl cyanide,(C) a graft copolymer comprising a core and a graft shell and(D) a further graft copolymer comprising a core and a graft shell,the average particle size (d.sub.50)-C of the graft copolymer (C) being from 25 to 60 nm and that of the graft copolymer (D) being from 90 to 300 nm and the ratio of the average particle size (d.sub.50)-C to (d.sub.50)-D being kept in the range from 2:1 to 5:1.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: October 19, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Kristin Tiefensee, Norbert Guntherberg
  • Patent number: 5767201
    Abstract: Emulsion graft copolymers are composed ofA) from 5 to 18% by weight of a first stage comprisinga.sub.1) from 85 to 99% by weight of methyl methacrylate,a.sub.2) from 1 to 15% by weight of C.sub.1 -C.sub.8 -alkyl acrylate,a.sub.3) from 0 to 2% by weight of allyl methacrylate anda.sub.4) from 0 to 3% by weight of further di- or polyfunctional comonomers,B) from 25 to 35% by weight of a second stage comprisingb.sub.1) from 10 to 25% by weight of vinylaromatic monomers,b.sub.2) from 75 to 90% by weight of C.sub.1 -C.sub.20 -alkyl acrylate andb.sub.3) from 0 to 3% by weight of allyl methacrylate,C) from 30 to 40% by weight of a third stage comprisingc.sub.1) from 15 to 27% by weight of vinylaromatic monomers,c.sub.2) from 73 to 85% by weight of C.sub.1 -C.sub.20 -alkyl acrylate andc.sub.3) from 0 to 3% by weight of allyl methacrylate andD) from 15 to 30% by weight of a fourth stage comprisingd.sub.1) from 85 to 96% by weight of methyl methacrylate,d.sub.2) from 3.8 to 10% by weight of C.sub.1 -C.sub.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: June 16, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Guenter Zimmer, Josef Poegel, Kristin Tiefensee
  • Patent number: 5576385
    Abstract: Thermoplastic molding materials containing a mixture of(A) from 15 to 70% by weight of a methacrylate polymer,(B) from 10 to 50% by weight of a copolymer obtained by polymerization of a mixture of(B1) a vinylaromatic monomer and(B2) a vinyl cyanide,(C) from 20 to 50% by weight of a graft copolymer of(C1) 50-80% by weight of a core of(C11) from 50 to 100% by weight of a 1,3-diene and(C12) from 0 to 50% by weight of a vinylaromatic monomer and(C2) 20-50% by weight of a graft shell of(C21) a C.sub.1 -C.sub.8 -alkyl ester of methacrylic or acrylic acid and(C22) a vinylaromatic monomer,with the proviso that the medium particle size (d.sub.50) of the graft copolymer is chosen in the range from 40 to 500 nm, and(D) from 0.5 to 15% by weight of a crosslinked methacrylate polymer.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: November 19, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Kristin Tiefensee, Norbert G untherberg, Rainer Neumann, Ekkehard Jahns
  • Patent number: 5457157
    Abstract: Molding materials contain from 5 to 50% by weight of a first polymer obtained by polymerizing a C.sub.1 -C.sub.20 -alkyl ester of methacrylic or acrylic acid;from 5 to 50% by weight of a second polymer obtained by polymerizing a monomer mixture offrom 75 to 82% by weight of a vinyl aromatic monomer and from 18 to 25% by weight of acrylonitrile or methacrylonitrile;from 10 to 40% by weight of a third polymer containing from 10 to 90% by weight of units of the general formula I ##STR1## where R.sup.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl and R.sup.2 is C.sub.1 -C.sub.18 -alkyl, C.sub.5 -C.sub.12 -cycloalkyl, C.sub.6 -C.sub.10 -aryl or C.sub.6 -C.sub.10 -aryl-C.sub.1 -C.sub.4 -alkyl, andfrom 10 to 90% by weight of a C.sub.1 -C.sub.20 -alkyl ester of methacrylic or acrylic acid;from 5 to 60% by weight of a graft copolymer having a mean particle diameter (weight average) of less than 200 nm and obtained by polymerizing from 20 to 70% by weight of a monomer mixture offrom 30 to 100% by weight of a C.sub.1 -C.sub.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: October 10, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Deckers, Norbert Guentherberg, Kristin Tiefensee