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:
May. 23, 2006
Filed:
Nov. 15, 2002
David K. Chen, Rochester Hills, MI (US);
Da Yu Wang, Troy, MI (US);
Yingjie Lin, El Paso, TX (US);
Raymond L. Bloink, Swartz Creek, MI (US);
Devesh Srivastava, Flint, MI (US);
Walter T. Symons, Grand Blanc, MI (US);
Kaius K. Polikarpus, Grand Blanc, MI (US);
David K. Chen, Rochester Hills, MI (US);
Da Yu Wang, Troy, MI (US);
Yingjie Lin, El Paso, TX (US);
Raymond L. Bloink, Swartz Creek, MI (US);
Devesh Srivastava, Flint, MI (US);
Walter T. Symons, Grand Blanc, MI (US);
Kaius K. Polikarpus, Grand Blanc, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A sensor comprises: a pump cell comprising an inner pump electrode, an outer pump electrode, a pump cell electrolyte layer interposed between the inner pump electrode and the outer pump electrode and a cell isolation layer disposed on the inner pump electrode on a side opposite the pump cell electrolyte, wherein the outer electrode is in fluid communication with a reducing gas. A reference cell is in operable communication with the pump cell, the reference cell comprising an outer reference electrode and an inner reference electrode, and a reference cell electrolyte interposed between the outer reference electrode and the inner reference electrode. A diffusion limiting material flanks both sides of a chamber formed between the cell isolation layer and a cell separation layer, wherein the cell separation layer comprises a via coaxial and in fluid communication with the inner pump electrode, the diffusing limiting material, and the outer reference electrode, and wherein the diffusion limiting material has a gas permeability such that the limiting current of oxygen in air is about 0.05 mA to about 5 mA per cmof pump electrode area.