Patents by Inventor Steven P. Wazenkewitz

Steven P. Wazenkewitz 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 recovering methylene chloride
    Patent number: 7163606
    Abstract: A system for recovering methylene chloride from an aqueous waste stream is disclosed. The system includes a distillation unit, at least one heat transfer unit, receptacles for methylene chloride and waste product, a temperature probe and a controller configured to selectively divert product flow from the distillation unit to either of the receptacles or to a recycle line back to the distillation unit depending upon the temperature measured by the probe. Also disclosed is a related process of recovering methylene chloride with such a system.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: January 16, 2007
    Assignee: Xerox Corporation
    Inventors: Thomas B. Glenwright, Warren R. Smith, Betsy B. Dodge, Steven P. Wazenkewitz, Ronald L. Swift