Patents by Inventor Claudia Fuhrmann

Claudia Fuhrmann 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 for preparing aqueous colloidal silica sols of high purity from alkali metal silicate solutions
    Patent number: 10065865
    Abstract: The present invention relates to a process for preparing aqueous colloidal silica sols of high purity from silicate solutions, to aqueous colloidal silica sols with a specific profile of impurities, and to the use thereof. The invention further encompasses high-purity aqueous silica obtained as an intermediate in the course of the purification process, high-purity silicon dioxide obtainable by dewatering, and the use thereof.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: September 4, 2018
    Assignee: Evonik Degussa GmbH
    Inventors: Claudia Fuhrmann, Dieter Oehm, Christian Panz, Florian Paulat, Rüdiger Schütte, Hartwig Rauleder, Georg Markowz, Jürgen Erwin Lang, Bodo Frings
  • PROCESS FOR PREPARING AQUEOUS COLLOIDAL SILICA SOLS OF HIGH PURITY FROM ALKALI METAL SILICATE SOLUTIONS
    Publication number: 20140042359
    Abstract: The present invention relates to a process for preparing aqueous colloidal silica sols of high purity from silicate solutions, to aqueous colloidal silica sols with a specific profile of impurities, and to the use thereof. The invention further encompasses high-purity aqueous silica obtained as an intermediate in the course of the purification process, high-purity silicon dioxide obtainable by dewatering, and the use thereof.
    Type: Application
    Filed: February 9, 2012
    Publication date: February 13, 2014
    Applicant: EVONIK DEGUSSA GMBH
    Inventors: Claudia Fuhrmann, Dieter Oehm, Christian Panz, Florian Paulat, Rüdiger Schütte, Hartwig Rauleder, Georg Markowz, Jürgen Erwin Lang, Bodo Frings