Patents by Inventor Tod E. Lange

Tod E. Lange 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).

  • Treatment of vent gas to remove hydrogen chloride
    Patent number: 5401872
    Abstract: A process for recovering chlorine present in a gaseous vent stream. The process comprises contacting a gaseous vent gas comprising hydrogen chloride and a hydrosilane with a chlorination catalyst to form a more chlorinated silane. The chlorination of the hydrosilane captures the chlorine of the hydrogen chloride as a substituent of the resulting chlorosilane and provides for a readily condensable chlorosilane.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: March 28, 1995
    Assignee: Hemlock Semiconductor
    Inventors: Richard A. Burgie, Owen A. Heng, Tod E. Lange