Patents by Inventor Christian Bierhaus

Christian Bierhaus 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 of making and method of use of fine-grained polyarylene ether ketone powder
    Patent number: 7875234
    Abstract: A milling process for the preparation of fine-particled polyarylene ether ketone comprises milling a porous polyarylene ether ketone having a BET surface area of more than 1 m2/g.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: January 25, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Alexander Richter, Patrick Kreidler, Holger Renners, Wolfgang Christoph, Heinrich Temme, Christian Bierhaus
  • FINE-GRAINED POLYARYLENE ETHER KETONE POWDER
    Publication number: 20090280263
    Abstract: A milling process for the preparation of fine-particled polyarylene ether ketone comprises milling a porous polyarylene ether ketone having a BET surface area of more than 1 m2/g.
    Type: Application
    Filed: November 22, 2005
    Publication date: November 12, 2009
    Applicant: DEGUSSA Gmbh
    Inventors: Alexander Richter, Patric Kreidler, Holger Renners, Wolfgang Christoph, Heinrich Temme, Christian Bierhaus
  • Method for Producing Polyarylene Ether Ketones
    Publication number: 20080085990
    Abstract: A process for preparing a polyarylene ether ketone comprises the following process steps: a) reaction of an aromatic dihalogen compound with a bisphenol and/or a halophenol in the presence of alkali metal and/or alkaline earth metal carbonate or hydrogencarbonate in a high-boiling aprotic solvent to give a polyarylene ether ketone, b) wet comminution and simultaneous preextraction of the solidified reaction mixture, c) extraction and filtration of the wet-comminuted product in a pressure suction filter and d) drying of the extracted product. This combination enables improved workup of the reaction mixture.
    Type: Application
    Filed: November 18, 2005
    Publication date: April 10, 2008
    Applicant: DEGUSSA GmbH
    Inventors: Alexander Richter, Bernd Gunzel, Christian Bierhaus, Patrick Kreidler, Stefan Nordhoff, Michael Krenz