Patents by Inventor Walter J. Symons

Walter J. Symons 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).

  • Exhaust species sensing method and device
    Patent number: 6616820
    Abstract: A gas sensor for sensing NOx having electrochemical cells wherein dielectric material surrounds electrolytes except where electrodes are attached. Thereby, the exhaust gas is effectively prevented from contacting the electrolytes of the sensor's electrochemical cells. With the use of this technique, signal cross talk is minimized while enhancing NOx sensing sensitivity. Further, the total number electrodes needed are reduced which allows for more complex sensors structures.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: September 9, 2003
    Assignee: Delphi Technologies, Inc.
    Inventors: Da Yu Wang, Raymond L. Bloink, Frederick L. Kennard, Lone-Wen F. Tai, Eric J. Detwiler, Walter J. Symons, Paul C. Kikuchi, Lora Younkman
  • Exhaust species sensing method and device
    Publication number: 20020106306
    Abstract: A gas sensor for sensing NOx having electrochemical cells wherein dielectric material surrounds electrolytes except where electrodes are attached. Thereby, the exhaust gas is effectively prevented from contacting the electrolytes of the sensor's electrochemical cells. With the use of this technique, signal cross talk is minimized while enhancing NOx sensing sensitivity. Further, the total number electrodes needed are reduced which allows for more complex sensors structures.
    Type: Application
    Filed: December 15, 2000
    Publication date: August 8, 2002
    Inventors: Da Yu Wang, Raymond L. Bloink, Frederick L. Kennard, Lone-Wen F. Tai, Eric J. Detwiler, Walter J. Symons, Paul C. Kikuchi, Lora Younkman