Patents by Inventor Franz Grunwald

Franz Grunwald 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).

  • 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