Patents by Inventor Guido Naberfeld

Guido Naberfeld 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).

  • Method for separating an organic phase from an electrolyte-containing aqueous and organic phase
    Patent number: 8354028
    Abstract: A method for separating electrolyte-containing water from an organic phase by means of permeation on a hydrophobic separating means. The permeated organic solution is substantially depleted in water and the retained water is enriched with electrolytes.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: January 15, 2013
    Assignee: Bayer Material Science AG
    Inventors: Helmut Meyer, Guido Naberfeld, Johann Rechner, Rafael Warsitz, Michael Traving, Werner Bäcker, Thomas Elsner, Arno Nennemann, Stephan Bahnmuler, Gerhard Langstein, Julia Hitzbleck, Patrick Theato, Daniel Kessler, Daniel-Gordon Duff, Sascha Plug
  • Process for stripping polymer polyols
    Patent number: 7790804
    Abstract: The invention provides a process for the purification of polymer polyols that ensures a reduction of acrylonitrile, styrene as well as the residual amounts of optionally used chain regulator, and of occurring recombination products of the initiator when azo initiators are used, to levels of <25 ppm of acrylonitrile, <50 ppm styrene, <50 ppm chain regulator and <280 ppm of recombination products by stripping using packed columns.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: September 7, 2010
    Assignee: Bayer MaterialScience AG
    Inventors: Michael Brockelt, Ludwig Deibele, Manfred Dietrich, Markus Hadley, Jan Thomas Leu, Guido Naberfeld, Ralf Dohrn
  • METHOD FOR SEPARATING AN ORGANIC PHASE FROM AN ELECTROLYTE-CONTAINING AQUEOUS AND ORGANIC PHASE
    Publication number: 20080185343
    Abstract: A method for separating electrolyte-containing water from an organic phase by means of permeation on a hydrophobic separating means. The permeated organic solution is substantially depleted in water and the retained water is enriched with electrolytes.
    Type: Application
    Filed: October 22, 2007
    Publication date: August 7, 2008
    Applicant: BAYER MATERIALSCIENCE AG
    Inventors: HELMUT MEYER, GUIDO NABERFELD, JOHANN RECHNER, RAFAEL WARSITZ, MICHAEL TRAVING, WERNER BACKER, THOMAS ELSNER, ARNO NENNEMANN
  • Process for stripping polymer polyols
    Publication number: 20080033139
    Abstract: The invention relates to a process for the purification of polymer polyols by stripping using packed columns.
    Type: Application
    Filed: June 22, 2007
    Publication date: February 7, 2008
    Inventors: Michael Brockelt, Ludwig Deibele, Manfred Dietrich, Markus Hadley, Jan Leu, Guido Naberfeld, Ralf Dohrn