Patents by Inventor Jan-Stephan Gehrke

Jan-Stephan Gehrke 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).

  • Transparent article made of PVC graft copolymers
    Patent number: 10407530
    Abstract: The invention relates to a method for preparing vinyl chloride graft copolymers by emulsion polymerization and to a method for preparing blends of such graft copolymers. The invention also relates to transparent molded articles prepared by using the graft copolymers according to the invention and their blends, respectively.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: September 10, 2019
    Assignee: VESTOLIT GmbH & Co. KG
    Inventors: Davide Brizzolara, Ingo Fischer, Jan-Stephan Gehrke, Dieter Polte, Axel Stieneker, Harald Sturm
  • Transparent article made of PVC graft copolymers
    Patent number: 10407529
    Abstract: The invention relates to a method for producing vinyl chloride graft copolymers by emulsion polymerization and to a method for producing mixtures of said graft copolymers. The invention also relates to transparent articles produced using the claimed graft copolymers or mixtures thereof.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: September 10, 2019
    Assignee: VESTOLIT GmbH & Co. KG
    Inventors: Davide Brizzolara, Ingo Fischer, Jan-Stephan Gehrke, Dieter Polte, Axel Stieneker, Harald Sturm
  • Transparent article made of PVC graft copolymers
    Patent number: 10125208
    Abstract: The invention relates to a method for preparing vinyl chloride graft copolymers by emulsion polymerization and to a method for preparing blends of such graft copolymers. The invention also relates to transparent molded articles prepared by using the graft copolymers according to the invention and their blends, respectively.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: November 13, 2018
    Assignee: VESTOLIT GmbH & Co. KG
    Inventors: Davide Brizzolara, Ingo Fischer, Jan-Stephan Gehrke, Dieter Polte, Axel Stieneker, Harald Sturm
  • TRANSPARENT ARTICLE MADE OF PVC GRAFT COPOLYMERS
    Publication number: 20180273667
    Abstract: The invention relates to a method for preparing vinyl chloride graft copolymers by emulsion polymerization and to a method for preparing blends of such graft copolymers. The invention also relates to transparent molded articles prepared by using the graft copolymers according to the invention and their blends, respectively.
    Type: Application
    Filed: May 30, 2018
    Publication date: September 27, 2018
    Inventors: Davide Brizzolara, Ingo Fischer, Jan-Stephan Gehrke, Dieter Polte, Axel Stieneker, Harald Sturm
  • TRANSPARENT ARTICLE MADE OF PVC GRAFT COPOLYMERS
    Publication number: 20180273666
    Abstract: The invention relates to a method for producing vinyl chloride graft copolymers by emulsion polymerization and to a method for producing mixtures of said graft copolymers. The invention also relates to transparent articles produced using the claimed graft copolymers or mixtures thereof.
    Type: Application
    Filed: May 30, 2018
    Publication date: September 27, 2018
    Inventors: Davide Brizzolara, Ingo Fischer, Jan-Stephan Gehrke, Dieter Polte, Axel Stieneker, Harald Sturm
  • Plasticizer-free article made of PVC graft copolymers
    Patent number: 9957385
    Abstract: The invention relates to blends of vinyl chloride graft copolymers as well as to a method for preparing such vinyl chloride graft copolymers and their blends. The invention also relates to molded articles manufactured by using the blends according to the invention.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: May 1, 2018
    Assignee: VESTOLIT GmbH & Co. KG
    Inventors: Davide Brizzolara, Ingo Fischer, Jan-Stephan Gehrke, Dieter Polte, Axel Stieneker, Harald Sturm
  • PLASTICIZER-FREE ARTICLE MADE OF PVC GRAFT COPOLYMERS
    Publication number: 20160075870
    Abstract: The invention relates to blends of vinyl chloride graft copolymers as well as to a method for preparing such vinyl chloride graft copolymers and their blends. The invention also relates to molded articles manufactured by using the blends according to the invention.
    Type: Application
    Filed: February 11, 2013
    Publication date: March 17, 2016
    Inventors: Davide Brizzolara, Ingo Fischer, Jan-Stephan Gehrke, Dieter Polte, Axel Stieneker, Harald Sturm
  • TRANSPARENT ARTICLE MADE OF PVC GRAFT COPOLYMERS
    Publication number: 20160075812
    Abstract: The invention relates to a method for preparing vinyl chloride graft copolymers by emulsion polymerization and to a method for preparing blends of such graft copolymers. The invention also relates to transparent molded articles prepared by using the graft copolymers according to the invention and their blends, respectively.
    Type: Application
    Filed: February 11, 2013
    Publication date: March 17, 2016
    Inventors: Davide Brizzolara, Ingo Fischer, Jan-Stephan Gehrke, Dieter Polte, Axel Stieneker, Harald Sturm
  • TRANSPARENT ARTICLE MADE OF PVC GRAFT COPOLYMERS
    Publication number: 20160075811
    Abstract: The invention relates to a method for producing vinyl chloride graft copolymers by emulsion polymerization and to a method for producing mixtures of said graft copolymers. The invention also relates to transparent molded bodies produced using the claimed graft copolymers or mixtures thereof.
    Type: Application
    Filed: February 11, 2013
    Publication date: March 17, 2016
    Inventors: Davide Brizzolara, Ingo Fischer, Jan-Stephan Gehrke, Dieter Polte, Axel Stieneker, Harald Sturm
  • PROCESS FOR PREPARATION OF PASTABLE POLYMERS
    Publication number: 20090105431
    Abstract: The present invention relates to a single-stage batch process for preparation of pastable polymers, in particular of vinyl chloride homo- and copolymers, by the microsuspension process, where these in a blend with plasticizers give PVC pastes, also termed plastisols, with very low viscosities and with very low emulsifier contents.
    Type: Application
    Filed: February 17, 2006
    Publication date: April 23, 2009
    Applicant: VESTOLIT GMBH & CO. KG
    Inventors: Heinz Bankholt, Jan-Stephan Gehrke, Kurt Muller, Axel Stieneker, Michael Trager