Patents by Inventor Petra Fritzen

Petra Fritzen 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: 20200325344
    Abstract: This disclosure describes a process for producing a surface-modified calcium carbonate, the process comprising contacting a calcium carbonate or precursor thereof with at least one amphiphilic copolymer comprising hydrophilic subunits and hydrophobic subunits, in which the hydrophilic subunits derive from at least one ethylenically-unsaturated compound comprising a carboxylic acid group or salt or derivative thereof; the hydrophobic subunits derive from at least one ethylenically-unsaturated compound comprising a hydrophobic group; and the amphiphilic copolymer has a hydrophilic-lipophilic balance ranging from about 1 to about 40. Surface-modified calcium carbonates obtained from the process are also described, as well as compositions containing the surface-modified calcium carbonates.
    Type: Application
    Filed: December 21, 2018
    Publication date: October 15, 2020
    Inventors: Virendra SINGH, Kalena STOVALL, Parvin GOLBAYANI, Richardo M. PEREZ, David A. TAYLOR, Christopher D. PAYNTER, Douglas WICKS, Petra FRITZEN, Anaelle GIRARD
  • Patent number: 10131792
    Abstract: A method for producing surface-treated particles includes surface treatment of titanium dioxide, barium sulfate, zinc sulfide or lithopone particles, and to mixtures of the particles with alkoxylated siloxanes and phthalate-free plasticizers for improving dispersion in plastics.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: November 20, 2018
    Assignee: Huntsman P&A Germany GmbH
    Inventors: Petra Fritzen, Bernd Rohe, Jörg Hocken
  • Patent number: 9783656
    Abstract: Surface treatment of titanium dioxide, barium sulfate, zinc sulfide, and/or lithopone particles, and mixtures of said particles with specific alkoxylated siloxanes for the improvement of dispersion in plastics.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: October 10, 2017
    Assignees: Evonik Degussa GmbH, Huntsman P&A Germany GmbH
    Inventors: Kathrin Lehmann, Frauke Henning, Christian Mund, Bernd Rohe, Petra Fritzen, Joerg Hocken
  • Publication number: 20170066924
    Abstract: A method for producing surface-treated particles includes surface treatment of titanium dioxide, barium sulfate, zinc sulfide or lithopone particles, and to mixtures of the particles with alkoxylated siloxanes and phthalate-free plasticizers for improving dispersion in plastics.
    Type: Application
    Filed: March 13, 2015
    Publication date: March 9, 2017
    Applicant: Huntsman P&A Germany GmbH
    Inventors: Petra Fritzen, Bernd Rohe, Jörg Hocken
  • Publication number: 20170002181
    Abstract: Surface treatment of titanium dioxide, barium sulfate, zinc sulfide, and/or lithopone particles, and mixtures of said particles with specific alkoxylated siloxanes for the improvement of dispersion in plastics.
    Type: Application
    Filed: December 8, 2014
    Publication date: January 5, 2017
    Applicant: Evonik Degussa GmbH
    Inventors: Kathrin LEHMANN, Frauke HENNING, Christian MUND, Bernd ROHE, Petra FRITZEN, Joerg HOCKEN
  • Patent number: 9212194
    Abstract: A method of making a powder coating composition includes obtaining functionalized particles by reacting inorganic particles with alkoxysilanes having the general structural formula (I) R1Si(OR2)3, silane oligomers having the general structural formula (II) (R1)(OR2)2Si—O—[—Si(R1)(OR2)—O—]m?—Si(R1)(OR2)2 or mixtures thereof.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: December 15, 2015
    Assignee: SACHTLEBEN CHEMIE GMBH
    Inventors: Petra Fritzen, Bernd Rohe
  • Publication number: 20130096235
    Abstract: A method of making a powder coating composition includes obtaining functionalized particles by reacting inorganic particles with alkoxysilanes having the general structural formula (I) R1Si(OR2)3, silane oligomers having the general structural formula (II) (R1)(OR2)2Si-O-[-Si(R1)(OR2)-O-]m-Si(R1)(OR2)2 or mixtures thereof.
    Type: Application
    Filed: May 19, 2011
    Publication date: April 18, 2013
    Applicant: SACHTLEBEN CHEMIE GMBH
    Inventors: Petra Fritzen, Bernd Rohe
  • Patent number: 8383712
    Abstract: The present invention relates to a plastic comprising zinc sulphide and to its use.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: February 26, 2013
    Assignee: Sachtleben Chemie GmbH
    Inventors: Stéphane David, Petra Fritzen, Ludger Heiming, Thomas Rentschler
  • Publication number: 20100189940
    Abstract: The invention provides titanium-dioxide-containing composites, a method for their production and the use of these composites.
    Type: Application
    Filed: August 27, 2007
    Publication date: July 29, 2010
    Applicant: SACHTLEBEN CHEMIE GMBH
    Inventors: Sonja Grothe, Petra Fritzen, Jochen Winkler, Bernd Rohe, Birgit Bittmann, Frank Haupert, Nicole Knör
  • Publication number: 20100160514
    Abstract: The present invention relates to a plastic comprising zinc sulphide and to its use.
    Type: Application
    Filed: June 21, 2007
    Publication date: June 24, 2010
    Inventors: Stephane David, Petra Fritzen, Ludger Heiming, Thomas Rentschler
  • Publication number: 20100015437
    Abstract: Titanium dioxide-containing composites, methods for producing them and the use of the composites.
    Type: Application
    Filed: August 27, 2007
    Publication date: January 21, 2010
    Inventors: Sonja Grothe, Petra Fritzen, Jochen Winkler, Bernd Rohe
  • Publication number: 20090326114
    Abstract: Barium sulfate-containing composites, to methods for producing them and methods of using of the composites, as well as components containing the composites.
    Type: Application
    Filed: August 27, 2007
    Publication date: December 31, 2009
    Inventors: Sonja Grothe, Petra Fritzen, Jochen Winkler, Bernd Rohe
  • Publication number: 20090318594
    Abstract: Barium sulfate-containing composites, to methods for producing the same and to the use of said composites.
    Type: Application
    Filed: August 27, 2007
    Publication date: December 24, 2009
    Applicants: SACHTLEBEN CHEMIE GMBH, INSTITUT FÜR VERBUNDWERKSTOFFE GMBH
    Inventors: Sonja Grothe, Petra Fritzen, Jochen Winkler, Bernd Rohe, Birgit Bittmann, Frank Haupert