Patents by Inventor Sönke Rolfs

Sönke Rolfs 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).

  • Ceria zirconia alumina composition with enhanced thermal stability
    Patent number: 9889428
    Abstract: A process for the preparation of a calcined mixed oxide comprising Al-, Ce- and Zr-oxides, comprising the steps of providing an aqueous slurry comprising hydroxides of cerium and zirconium, contacting the hydroxides of cerium and zirconium with an alumina precursor to obtain an aqueous suspension of solids, isolating the solids from the aqueous suspension and drying to obtain a solid composition, calcining the solid composition of step (c) at a temperature from 450° C. to 1200° C. for at least 1 hour to obtain a calcined mixed oxide.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: February 13, 2018
    Assignees: TREIBACHER INDUSTRIE AG, SASOL GERMANY GMBH
    Inventors: Karl Schermanz, Amod Sagar, Marcos Schöneborn, Reiner Glöckler, Kai Dallmann, Frank Alber, Sönke Rolfs
  • CERIA ZIRCONIA ALUMINA COMPOSITION WITH ENHANCED THERMAL STABILITY
    Publication number: 20130017947
    Abstract: A process for the preparation of a calcined mixed oxide comprising Al-, Ce- and Zr-oxides, comprising the steps of providing an aqueous slurry comprising hydroxides of cerium and zirconium, contacting the hydroxides of cerium and zirconium with an alumina precursor to obtain an aqueous suspension of solids, isolating the solids from the aqueous suspension and drying to obtain a solid composition, calcining the solid composition of step (c) at a temperature from 450° C. to 1200° C. for at least 1 hour to obtain a calcined mixed oxide.
    Type: Application
    Filed: July 13, 2012
    Publication date: January 17, 2013
    Applicants: Sasol Germany GmbH, Treibacher Industries AG
    Inventors: Karl Schermanz, Amod Sagar, Marcos Schöneborn, Reiner Glöckler, Kai Dallmann, Frank Alber, Sönke Rolfs