Patents by Inventor Hans-Peter Bortner

Hans-Peter Bortner 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 removing gaseous contaminating compounds from carrier gases containing halosilane compounds
    Patent number: 5051117
    Abstract: A process for removing contaminants, particularly dopant, from halosilane-containing carrier gases, such as those which are produced in the production of high-purity silicon. The process of the invention is perferably carried out with aid of zeolites which has a low proportion of aluminum and are used in the anhydrous state by bringing the zeolites into contact with the carrier gases. Zeolites, after use, can be regenerated and re-used by increasing the temperature and/or decreasing the pressure of the procedure.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: September 24, 1991
    Assignee: Wacker-Chemitronic Gesellschaft fur Elektronik-Grundstoffe mbH
    Inventors: Helene Prigge, Robert Rurlander, Harald Hoffman, Hans-Peter Bortner