Patents by Inventor Claus-Peter Drexel

Claus-Peter Drexel 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).

  • Silica and silicate by precipitation at constant alkali number, and its use
    Publication number: 20030003040
    Abstract: Precipitated silica or silicates, obtainable by acid precipitation of aqueous silicate solutions while maintaining a constant alkali number of at least 1.
    Type: Application
    Filed: February 22, 2002
    Publication date: January 2, 2003
    Applicant: DE GUSSA AG
    Inventors: Gottlieb-Georg Lindner, Robert Kuhlmann, Claus-Peter Drexel