Patents by Inventor Joerg Kirchhoff

Joerg Kirchhoff 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).

  • Ultra-high purity polycarbonates having good inherent color and thermal resistance and a device and a method for producing the same
    Patent number: 10435507
    Abstract: The invention relates to polycarbonates with extremely low residual levels of volatile constituents and thermal degradation products, and also improved optical properties, especially Yellowness Index (YI) and good thermal stability, from solvent-containing polymer melts. The invention further relates to an apparatus and a process for preparing these polycarbonates with the aid of a devolatilizing extruder with at least three devolatilizing zones, and zones for introducing entraining agent into dispersion are present upstream of at least three devolatilizing zones.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: October 8, 2019
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Thomas Koenig, Joerg Kirchhoff, Michael Bierdel, Klemens Kohlgrueber, Johann Rechner, Ing. Johan Vaes, Johan Vanden Eynde, Frank Bruynseels, Bert Ruytinx
  • ULTRA-HIGH PURITY POLYCARBONATES HAVING GOOD INHERENT COLOR AND THERMAL RESISTANCE AND A DEVICE AND A METHOD FOR PRODUCING THE SAME
    Publication number: 20180105644
    Abstract: The invention relates to polycarbonates with extremely low residual levels of volatile constituents and thermal degradation products, and also improved optical properties, especially Yellowness Index (YI) and good thermal stability, from solvent-containing polymer melts. The invention further relates to an apparatus and a process for preparing these polycarbonates with the aid of a devolatilizing extruder with at least three devolatilizing zones, and zones for introducing entraining agent into dispersion are present upstream of at least three devolatilizing zones.
    Type: Application
    Filed: October 20, 2017
    Publication date: April 19, 2018
    Applicant: Covestro Deutschland AG
    Inventors: Thomas Koenig, Joerg Kirchhoff, Michael Bierdel, Klemens Kohlgrueber, Johann Rechner, Ing. Johan Vaes, Johan Vanden Eynde, Frank Bruynseels, Bert Ruytinx
  • Method for removing volatile components from elastomer-containing media and degassing devices therefor
    Patent number: 9925693
    Abstract: The invention relates to a method for degassing elastomer-containing media, such as elastomer solutions and dispersions in particular, and degassing devices (1) for carrying out said method.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: March 27, 2018
    Assignee: ARLANXEO Deutschland GmbH
    Inventors: Hanns-Ingolf Paul, Joerg Kirchhoff, Udo Wiesner, Luc Timmermans, Nicolai Dieltiens
  • STUFFING SCREW
    Publication number: 20180015434
    Abstract: A stuffing screw (2) for use in an extruder system comprises a housing (7) and at least one conveying screw (5), which is mounted in a rotatable manner within the housing (7), wherein a conveying space is formed between an inner side of the housing (7) and the conveying screw (5). The stuffing screw (2) is characterized in that at least one portion of the inner side of the housing (7) is provided with one or more depressions, in particular in the form of a groove (13).
    Type: Application
    Filed: January 21, 2016
    Publication date: January 18, 2018
    Applicant: ARLANXEO Deutschland GmbH
    Inventors: Joerg KIRCHHOFF, Thomas KOENIG, Michael BIERDEL
  • Degassing method, degassing device and use of screw elements
    Patent number: 9738770
    Abstract: The present invention relates to a process for devolatilising polymer-containing media such as, in particular, polymer melts, polymer solutions and dispersions and also devolatilisation apparatuses for carrying out the abovementioned process.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: August 22, 2017
    Assignee: ARLANXEO Deutschland GmbH
    Inventors: Joerg Kirchhoff, Thomas Koenig, Michael Bierdel
  • DEGASSING METHOD, DEGASSING DEVICE AND USE OF SCREW ELEMENTS
    Publication number: 20170058095
    Abstract: The present invention relates to a process for devolatilising polymer-containing media such as, in particular, polymer melts, polymer solutions and dispersions and also devolatilisation apparatuses for carrying out the abovementioned process.
    Type: Application
    Filed: October 7, 2016
    Publication date: March 2, 2017
    Inventors: Joerg KIRCHHOFF, Thomas KOENIG, Michael BIERDEL
  • Degassing method, degassing device and use of screw elements
    Patent number: 9487635
    Abstract: The present invention relates to a process for devolatilizing polymer-containing media such as, in particular, polymer melts, polymer solutions and dispersions and also devolatilisation apparatuses for carrying out the abovementioned process.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: November 8, 2016
    Assignee: ARLANXEO Deutschland GmbH
    Inventors: Joerg Kirchhoff, Thomas Koenig, Michael Bierdel
  • METHOD FOR REMOVING VOLATILE COMPONENTS FROM ELASTOMER-CONTAINING MEDIA AND DEGASSING DEVICES THEREFOR
    Publication number: 20160023376
    Abstract: The invention relates to a method for degassing elastomer-containing media, such as elastomer solutions and dispersions in particular, and degassing devices (1) for carrying out said method.
    Type: Application
    Filed: April 4, 2014
    Publication date: January 28, 2016
    Inventors: Hanns-Ingolf PAUL, Joerg KIRCHHOFF, Udo WIESNER, Luc TIMMERMANS, Nicolai DIELTIENS
  • DEGASSING METHOD, DEGASSING DEVICE AND USE OF SCREW ELEMENTS
    Publication number: 20150218335
    Abstract: The present invention relates to a process for devolatilising polymer-containing media such as, in particular, polymer melts, polymer solutions and dispersions and also devolatilisation apparatuses for carrying out the abovementioned process.
    Type: Application
    Filed: September 28, 2012
    Publication date: August 6, 2015
    Inventors: Joerg Kirchhoff, Thomas Koenig, Michael Bierdel