This inventor holds 3 USPTO granted patents. Top assignees: Daimlerchrysler Corporation, Tenneco Automotive Operating Company Inc.. Active years: 2005-2015.
Location History:
- Dearborn, MI (US) (2005)
- Pinckney, MI (US) (2007 - 2015)
Company Filing History:

Years Active: 2005-2015
Title: Innovations of Thomas W. Stephens
Introduction
Thomas W. Stephens is an accomplished inventor based in Dearborn, MI (US). He holds a total of 3 patents that showcase his expertise in automotive technologies. His innovative contributions have significantly impacted the field of exhaust treatment systems and internal combustion engines.
Latest Patents
One of his latest patents is an "Exhaust treatment system with urea temperature rationality diagnostic." This method involves monitoring an exhaust after-treatment system that doses an exhaust treatment fluid from a tank into an exhaust stream. The process includes determining the temperature of the exhaust treatment fluid and activating a heater if necessary. The system ensures that the exhaust treatment fluid maintains sufficient quality through careful temperature monitoring.
Another notable patent is the "Short runner valve diagnostic." This method diagnoses the operating condition of a short runner valve in an intake manifold using an exhaust sensor. By commanding the valve to an open position for a test period, the system evaluates whether the exhaust gas parameters exceed a certain threshold, issuing pass or fail signals accordingly.
Career Highlights
Throughout his career, Thomas has worked with prominent companies such as DaimlerChrysler Corporation and Tenneco Automotive Operating Company Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas in the automotive sector.
Collaborations
Thomas has collaborated with notable coworkers, including Roger C. Sager and David P. Ploucha. Their combined expertise has contributed to the successful development of various automotive technologies.
Conclusion
Thomas W. Stephens is a distinguished inventor whose work in exhaust treatment systems and internal combustion engines has made a lasting impact on the automotive industry. His innovative patents reflect his commitment to advancing technology and improving vehicle performance.