Patents by Inventor Andreas F. K. Hahn

Andreas F. K. Hahn 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 production of zeolites with high Si/Al atomic ratio
    Patent number: 6645461
    Abstract: A process for the production of zeolites with a high Si/Al atomic ratio formed by the conversion of amorphous polysilicas (polysilacic acid) with a source of aluminum ions and optionally a template wherein the conversion occurs at a temperature of less than about 100° C., wherein ammonium hydroxide and/or an alkali metal silicate is added to the conversion solution.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: November 11, 2003
    Assignee: Sud-Chemie AG
    Inventors: Klaus K. Unger, Andreas F. K. Hahn