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:
Jan. 12, 2016
Filed:
Nov. 20, 2012
Ngk Spark Plug Co. Ltd., Nagoya-shi, Aichi, JP;
Shigehiro Otsuka, Gifu, JP;
Masaki Onkawa, Komaki, JP;
Toru Iwano, Komaki, JP;
Satoshi Teramoto, Nisshin, JP;
Kuniharu Tanaka, Komaki, JP;
Takeshi Mitsuoka, Komaki, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A gas sensor element () including a detection portion () including a solid electrolyte body () and a pair of electrodes () and () disposed on the solid electrolyte body; and a porous protection layer () covering the detection portion. The porous protection layer includes an inner porous layer () and an outer porous layer (); the inner porous layer is higher in porosity than the outer porous layer; the inner porous layer contains, as main components, ceramic particles (), and ceramic fiber filaments () which are mainly formed of a ceramic material and which have a mean fiber length of 70 to 200 μm; and the amount of the ceramic fiber filaments is 25 to 75 vol % on the basis of the total amount of the ceramic particles and the ceramic fiber filaments, the total amount being taken as 100 vol %.