The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2007
Filed:
May. 15, 2003
Kailash Jain, Troy, MI (US);
Kenneth Rahmoeller, West Bloomfield, MI (US);
Da Yu Wang, Troy, MI (US);
Eric Clyde, Bay City, MI (US);
Paul Kikuchi, Fenton, MI (US);
Kailash Jain, Troy, MI (US);
Kenneth Rahmoeller, West Bloomfield, MI (US);
Da Yu Wang, Troy, MI (US);
Eric Clyde, Bay City, MI (US);
Paul Kikuchi, Fenton, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A two-step chemical treatment method for chemically conditioning a sensor element comprising an electrolyte in ionic communication with a first electrode and a second electrode is described. The method comprises treating at least a portion of a sensor element with a first solution comprising an inorganic base, a carbonate salt and an acid salt; heating the sensor element; treating at least a portion of the sensor element with a second solution comprising an inorganic base and a carbonate salt; and drying the sensor element. The gas sensors comprising the two-step treated sensor elements have reduced lean shift, green effect, sensor output amplitude drop, and the light-off time is improved.