Patents by Inventor Birgit Sauerbrey

Birgit Sauerbrey 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 lithium intercalation compounds
    Patent number: 6048643
    Abstract: The invention relates to a process for preparing lithium intercalation compounds by thermal solid state reaction of mixtures of lithium hydroxide or lithium oxide and oxides or oxide precursors of transition metals. A significant step of this process is the treatment of an aqueous suspension of the raw material components lithium hydroxide or lithium oxide and metal oxide or metal oxide precursors with hydrogen peroxide, resulting in the lithium compound going into solution. In the drying of the mixture, the lithium hydroxide is very uniformly absorbed onto the metal oxide. Calcination at temperatures between 450.degree. C. and 700.degree. C. results in complete reaction to form the lithium intercalation compound in less than 5 hours.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: April 11, 2000
    Assignee: Merck Patent Gesellschaft
    Inventors: Max van Ghemen, Birgit Sauerbrey, Ludwig Pohl
  • Process for preparing lithium intercalation compounds
    Patent number: 5879654
    Abstract: The invention relates to a process for preparing lithium intercalation compounds by thermal solid state reaction of mixtures of lithium hydroxide or lithium oxide and oxides or oxide precursors of transition metals. A significant step of this process is the treatment of an aqueous suspension of the raw material components lithium hydroxide or lithium oxide and metal oxide or metal oxide precursors with hydrogen peroxide, resulting in the lithium compound going into solution. In the drying of the mixture, the lithium hydroxide is very uniformly absorbed onto the metal oxide. Calcination at temperatures between 450.degree. C. and 700.degree. C. results in complete reaction to form the lithium intercalation compound in less than 5 hours.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: March 9, 1999
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Max van Ghemen, Birgit Sauerbrey, Ludwig Pohl