Patents by Inventor Christian Joachim Hahn

Christian Joachim Hahn 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).

  • Process and apparatus for continuous production of aqueous polyurethane dispersions
    Patent number: 10752727
    Abstract: The application relates to a process for continuously producing aqueous polyurethane dispersions, which is characterized by the use of micro structured mixing elements and addition of water twice during the dispersion step. The energy input in the mixing of the dispersion is low. In addition, the application describes an apparatus suitable for execution of the aforementioned process.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: August 25, 2020
    Assignee: Covestro Deutschland AG
    Inventors: Hans Georg Grablowitz, Alexander Pross, Reiner Witkowski, Holger Breuer, Sven Gestermann, Christian Joachim Hahn, Stephan Schubert, Joachim Ritter
  • METHOD FOR THE CONTINUOUS PRODUCTION OF STABLE PREPOLYMERS
    Publication number: 20170152342
    Abstract: The invention relates to a method for the continuous production of stable prepolymers based on high-melting diisocyanates, in particular, 1,5-naphthalindiisocyanate, and to the use thereof for producing polyurethane elastomers, in particular casting elastomers.
    Type: Application
    Filed: June 3, 2015
    Publication date: June 1, 2017
    Inventors: Josef Sanders, Andreas Hecking, Gerrit Woudenberg, Sigurd Buchholz, Christian Joachim Hahn, Ursula Tracht