Patents by Inventor Dieter Wehrhahn

Dieter Wehrhahn 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).

  • Polymer dispersions for fire prevention and firefighting
    Patent number: 8475675
    Abstract: The present invention relates to water-in-oil polymer dispersions comprising of a continuous organic phase and therein finely dispersed and cross-linked, water-swellable polymerizates, where these have a residual monomer content of less than 1,000 ppm. The present invention relates further to a process for the production of polymer dispersions according to the invention. In addition, the present invention relates to devices for fire prevention and firefighting and to the use of the polymer dispersions according to the invention.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: July 2, 2013
    Assignee: Evonik Degussa GmbH
    Inventors: Bernd Diener, Veronika Gehler, Erich Kuester, Daniel Roulands, Dieter Wehrhahn
  • POLYMER DISPERSIONS FOR FIRE PREVENTION AND FIREFIGHTING
    Publication number: 20080185160
    Abstract: The present invention relates to water-in-oil polymer dispersions comprising of a continuous organic phase and therein finely dispersed and cross-linked, water-swellable polymerizates, where these have a residual monomer content of less than 1,000 ppm. The present invention relates further to a process for the production of polymer dispersions according to the invention. In addition, the present invention relates to devices for fire prevention and firefighting and to the use of the polymer dispersions according to the invention.
    Type: Application
    Filed: March 12, 2008
    Publication date: August 7, 2008
    Inventors: Bernd DIENER, Veronika Gehler, Erich Kuester, Daniel Roulands, Dieter Wehrhahn
  • Polymer dispersions for fire prevention and firefighting
    Publication number: 20040006175
    Abstract: The present invention relates to water-in-oil polymer dispersions comprising of a continuous organic phase and therein finely dispersed and cross-linked, water-swellable polymerizates, where these have a residual monomer content of less than 1,000 ppm. The present invention relates further to a process for the production of polymer dispersions according to the invention. In addition, the present invention relates to devices for fire prevention and firefighting and to the use of the polymer dispersions according to the invention.
    Type: Application
    Filed: February 27, 2003
    Publication date: January 8, 2004
    Inventors: Bernd Diener, Veronika Gehler, Erich Kuester, Daniel Roulands, Dieter Wehrhahn