Patents by Inventor Erich Zimmerman

Erich Zimmerman 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).

  • Apparatus for two phase vacuum extraction of soil contaminants
    Patent number: 5197541
    Abstract: A process for two phase vacuum extraction of contaminants from the ground involves vacuum withdrawal of liquid and gaseous phases as a common stream, separation of the liquid and gaseous phases, and subsequent treatment of the separated liquid and gases to produce clean effluents. Two phase vacuum extraction employs a single vacuum generating device to remove contaminants in both the liquid stream and soil gases through a single well casing.
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: March 30, 1993
    Assignee: Xerox Corporation
    Inventors: Ronald E. Hess, Albert A. Hooper, Steven R. Morrow, Dianne J. Walker, Erich Zimmerman
  • Process for two phase vacuum extraction of soil contaminants
    Patent number: 5050676
    Abstract: A process for two phase vacuum extraction of contaminants from the ground involves vacuum withdrawal of liquid and gaseous phases as a common stream, separation of the liquid and gaseous phases, and subsequent treatment of the separated liquid and gases to produce clean effluents. Two phase vacuum extraction employs a single vacuum generating device to remove contaminants in both the liquid stream and soil gases through a single well casing.
    Type: Grant
    Filed: September 27, 1989
    Date of Patent: September 24, 1991
    Assignee: Xerox Corporation
    Inventors: Ronald E. Hess, Albert A. Hooper, Steven R. Morrow, Dianne J. Walker, Erich Zimmerman