Patents by Inventor Christine M. Liethen

Christine M. Liethen 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).

  • Patent number: 5701953
    Abstract: A well head for landfills or other sites at which waste has been disposed provides an enlarged chamber at the top of a well pipe holding hose and cable terminations on the walls of the chamber positioned out of the access path of the well pipe. A cover unattached to the hoses and cables can be removed for access without interference from the terminations. An extraction port in the cover defines a clear channel into the well pipe for sampling and monitoring equipment.
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: December 30, 1997
    Assignee: CH2M Hill, Inc.
    Inventors: Philip P. Stecker, Christine M. Liethen