Patents by Inventor Michael Grebner

Michael Grebner 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).

  • Clathrasil of the dodecasil 1 H structural type having a small average crystal size
    Patent number: 5435988
    Abstract: The invention relates to a process for the preparation of crystalline clathrasil of the dodecasil 1 H structural type having an average crystal size of not more than 20 .mu.m, characterised in that an alkaline aqueous silicate-containing medium comprising templates and crystallisation seeds is heat-treated, the crystallisation seeds content, relative to the SiO.sub.2 content of the medium, being not less than 1% by weight.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: July 25, 1995
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Michael Grebner, Axel Reich, Ferdi Schuth, Klaus Unger
  • Low-template clathrasil
    Patent number: 5368836
    Abstract: The invention relates to a process for the preparation of low-template clathrasil, comprising heat-treating an alkaline aqueous silicate-containing medium containing crystallization seeds and an amount of a template such that the template content of the clathrasil, relative to the number of moles of the SiO.sub.2 of the medium, is less than 2 mol %.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: November 29, 1994
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Michael Grebner, Axel Reich, Horst Reichert, Ferdi Schuth, Klaus Unger