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:
Mar. 19, 2013
Filed:
Sep. 30, 2009
Jin Su Park, Daejeon, KR;
Byung Young Yoon, Chungcheongnam-Do, KR;
Jung Won Park, Daejeon, KR;
Jung Hwan Cho, Chungcheongnam-Do, KR;
Sang Beom Kim, Chungcheongnam-Do, KR;
Jin Su Park, Daejeon, KR;
Byung Young Yoon, Chungcheongnam-Do, KR;
Jung Won Park, Daejeon, KR;
Jung Hwan Cho, Chungcheongnam-Do, KR;
Sang Beom Kim, Chungcheongnam-Do, KR;
Iljin Copper Foil Co., Ltd., Iksan, Jeollabuk-do, KR;
Cios Inc., Daejeon, KR;
Abstract
The present invention provides a nitrogen-oxide gas sensor that is able to measure nitric oxide and nitrogen dioxide at the same time and ensure measurement accuracy and long stability. For these purposes, the nitrogen-oxide gas sensor includes: an oxide ion conductive solid electrolyte; a primary film that contacts the solid electrolyte and is made of a p-type semi-conductor metal oxide; a secondary film that contacts the solid electrolyte and is made of a p-type semiconductor metal oxide; an n-type semiconductor metal oxide that is included in at least one of the primary and secondary films; a power source that applies electric power to the primary and secondary films by electrically connecting a primary node to the primary film and a secondary node to the secondary film; and a measurement unit that measures the electric potential difference between the primary and secondary nodes.