Cuprammonium Cellulose Patents (Class 106/167.01)
  • Production of cellulose nanoparticles
    Patent number: 8182839
    Abstract: The present invention relates to novel nanoparticles based on cellulose and a process for producing them and their use.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: May 22, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Jurgen Engelhardt, Birgit Kosan, Christa Maria Kruger, Frank Meister, Klaus Nachtkamp, Jens Schaller
  • Sprayable coating agent, its production, further processing and use thereof
    Patent number: 7717996
    Abstract: A sprayable coating agent is disclosed in the form of granules with which the granules are compacted to form a pressed piece, subsequently ground up and optionally sieved, whereby the granules have the following particle-size distribution: 0%-40% by weight: 0-600 microns; 5%-55% by weight: 600-1250 microns; 5%-95% by weight: >1250 microns; or 15% by weight: 0-800 microns; 0%-85% by weight: 800-2000 microns; 0%-15% by weight: >2000 microns. Likewise disclosed are its production, further processing and use for internal and external applications.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: May 18, 2010
    Inventors: Christian Bumm, Walter Frehse, Andreas Weigand
  • Method for producing cellulose particles
    Patent number: 6174358
    Abstract: A method for producing cellulose particles whereby a cellulose solution is dispersed in a regenerant or nonsolvent and the cellulose is regenerated or precipitated in dispersed form into cellulose particles.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: January 16, 2001
    Assignee: Cellcat GmbH
    Inventors: Jörg Oberkofler, Alexander Brandner, Jeffrey F. Spedding, Anton Schmalhofer