Patents by Inventor Ute Volkel

Ute Volkel 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).

  • Highly disperse metal oxides having a high positive surface charge
    Patent number: 8361622
    Abstract: Metal oxides are modified by aminohydrocarbyl-substituted monoalkyltrisiloxy groups in a defined percentage of T1 and T2 groups relative to total T groups wherein the T groups denote connectivity of siloxy bonds to the metal oxide have a high positive triboelectric chargeability, the triboelectric charge being stable even in conditions of high humidity.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: January 29, 2013
    Assignee: Wacker Chemie AG
    Inventors: Torsten Gottschalk-Gaudig, Ute Volkel
  • HIGHLY DISPERSE METAL OXIDES HAVING A HIGH POSITIVE SURFACE CHARGE
    Publication number: 20100196811
    Abstract: Metal oxides are modified by aminohydrocarbyl-substituted monoalkyltrisiloxy groups in a defined percentage of T1 and T2 groups relative to total T groups wherein the T groups denote connectivity of siloxy bonds to the metal oxide have a high positive triboelectric chargeability, the triboelectric charge being stable even in conditions of high humidity.
    Type: Application
    Filed: July 10, 2008
    Publication date: August 5, 2010
    Applicant: WACKER CHEMIE AG
    Inventors: Torsten Gottschalk-Gaudig, Ute Volkel
  • Low-silanol silica
    Patent number: 6800413
    Abstract: A silylated silica having an SiOH density per nm2 of less than 0.6, based on the BET-method surface area (DIN 66131 and 66132), is prepared by silylating silica in a process where loading, reacting, and purifying are performed in separate steps.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: October 5, 2004
    Assignee: Wacker-Chemie GmbH
    Inventors: Herbert Barthel, Mario Heinemann, Franz Grünwald, Helmut Maginot, Ute Völkel
  • Low-silanol silica
    Publication number: 20030138715
    Abstract: A silylated silica having an SiOH density per nm2 of less than 0.6, based on the BET-method surface area (DIN 66131 and 66132), is prepared by silylating silica in a process where loading, reacting, and purifying are performed in separate steps.
    Type: Application
    Filed: September 9, 2002
    Publication date: July 24, 2003
    Inventors: Herbert Barthel, Mario Heinemann, Franz Grunwald, Helmut Maginot, Ute Volkel