Patents by Inventor Lars-Olof Svedberg

Lars-Olof Svedberg 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: 10214624
    Abstract: An apparatus and a method for expanding a slurry of thermally expandable thermoplastic microsphere is disclosed. The apparatus and method expand the slurry of thermally expandable thermoplastic microsphere without any direct contact to a fluid heat transfer medium. The apparatus and method utilize a distribution pipe attached to an outlet pipe.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: February 26, 2019
    Assignees: AKZO NOBEL CHEMICALS INTERNATIONAL B.V., CONSTRUCTION RESEARCH & TECHNOLOGY GMBH
    Inventors: Jan Nordin, Lars-Olof Svedberg, Per Ajdén, Frank Shaode Ong
  • Publication number: 20180265662
    Abstract: An apparatus and a method for expanding a slurry of thermally expandable thermoplastic microsphere is disclosed. The apparatus and method expand the slurry of thermally expandable thermoplastic microsphere without any direct contact to a fluid heat transfer medium. The apparatus and method utilise a distribution pipe attached to an outlet pipe.
    Type: Application
    Filed: December 8, 2015
    Publication date: September 20, 2018
    Inventors: Jan NORDIN, Lars-Olof SVEDBERG, Per AJDÉN, Frank Shaode ONG
  • Patent number: 9718939
    Abstract: The invention relates to a method of preparing expanded thermoplastic microspheres from thermally expandable thermoplastic microspheres comprising a polymer shell encapsulating a foaming agent, the method comprising heating the expandable microspheres within a flexible container (2) to effect expansion of said microspheres and withdrawing gas from said flexible container (2). The invention further relates to an expansion device for preparing such expanded thermoplastic microspheres.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: August 1, 2017
    Assignee: Akzo Nobel Chemicals International B.V.
    Inventors: Lars-Olof Svedberg, Per Ajdén
  • Publication number: 20160115290
    Abstract: The invention relates to a method and a device for the preparation of expanded thermoplastic microspheres from unexpanded thermally expandable thermoplastic microspheres comprising a thermoplastic polymer shell encapsulating a blowing agent. The method comprises: (a) feeding a slurry of such expandable thermoplastic microspheres in a liquid medium into a heating zone; (b) heating the slurry in the heating zone, without direct contact with any fluid heat transfer medium, so the expandable microspheres reach at least a temperature at which they would have started to expand at atmospheric pressure, and maintaining a pressure in the heating zone sufficiently high so the microspheres in the slurry do not-fully expand; and, (c) withdrawing the slurry of expandable microspheres from the heating zone into a zone with a pressure sufficiently low for the microspheres to expand.
    Type: Application
    Filed: May 27, 2014
    Publication date: April 28, 2016
    Inventors: Lars-Olof Svedberg, Per Ajdén
  • Publication number: 20150210820
    Abstract: The invention relates to a method of preparing expanded thermoplastic microspheres from thermally expandable thermoplastic microspheres comprising a polymer shell encapsulating a foaming agent, the method comprising heating the expandable microspheres within a flexible container (2) to effect expansion of said microspheres and withdrawing gas from said flexible container (2). The invention further relates to an expansion device for preparing such expanded thermoplastic microspheres.
    Type: Application
    Filed: September 4, 2013
    Publication date: July 30, 2015
    Applicant: Akzo Nobel Chemicals International B.V.
    Inventors: Lars-Olof Svedberg, Per Ajdén
  • Patent number: 7192989
    Abstract: The present invention relates to a method of preparing expanded thermoplastic microspheres, comprising charging thermally expandable microspheres into an expansion device comprising rotating feeding means enveloped by a hollow body, and one or more scrapers. The invention further relates to an expansion device for expanding thermoplastic microspheres.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: March 20, 2007
    Assignee: Akzo Nobel N.V.
    Inventors: Lars-Olof Svedberg, Guy Hovland, Thomas Holmlund
  • Publication number: 20070043130
    Abstract: The present invention relates to a method of preparing expanded thermoplastic microspheres, comprising charging thermally expandable microspheres into an expansion device comprising rotating feeding means enveloped by a hollow body, and one or more scrapers. The invention further relates to an expansion device for expanding thermoplastic microspheres.
    Type: Application
    Filed: October 24, 2006
    Publication date: February 22, 2007
    Applicant: Akzo Nobel N.V.
    Inventors: Lars-Olof Svedberg, Guy Hovland, Thomas Holmlund
  • Publication number: 20040176487
    Abstract: The present invention relates to a method of preparing expanded thermoplastic microspheres, comprising charging thermally expandable microspheres into an expansion device comprising rotating feeding means enveloped by a hollow body, and one or more scrapers. The invention further relates to an expansion device for expanding thermoplastic microspheres.
    Type: Application
    Filed: December 17, 2003
    Publication date: September 9, 2004
    Inventors: Lars-Olof Svedberg, Guy Hovland, Thomas Holmlund
  • Patent number: 4397799
    Abstract: The present invention relates to a process for drying and expanding microspheres whereby first a dispersion of the microspheres in an inert liquid is prepared. This dispersion is then atomized in a hot inert gas. The process of the invention is advantageously carried out in a spray dryer.
    Type: Grant
    Filed: December 18, 1981
    Date of Patent: August 9, 1983
    Assignee: KemaNord AB
    Inventors: Anders T. Edgren, Lars-Olof Svedberg