Patents by Inventor Dao Duong

Dao Duong 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).

  • Modified noble metal catalyst based calorimetric sensor and method
    Patent number: 5858306
    Abstract: A modified noble metal catalyst based calorimetric sensor for sensing non-methane hydrocarbons in an automotive exhaust gas stream includes a first sensing element (105) with an output that provides a signal (111) indicative of a concentration of indicative of non-methane hydrocarbons, hydrogen (H.sub.2), and carbon monoxide (CO). A compensating sensing element (107) has an output that provides a compensating signal (113) indicative of a concentration of hydrogen (H.sub.2) and carbon monoxide (CO). A circuit for combining the signal and the compensating signal provides a combined signal indicative of a measure of non-methane hydrocarbons in the automotive exhaust gas stream.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: January 12, 1999
    Assignee: Motorola, Inc.
    Inventors: Seajin Oh, Jose Joseph, Dao Duong, Neil J. Adams, Steven L. Plee