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. 14, 2015
Filed:
Oct. 31, 2012
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Sigehiro Otsuka, Gifu, JP;
Masaki Onkawa, Komaki, JP;
Toru Iwano, Komaki, JP;
Satoshi Teramoto, Nisshin, JP;
Kuniharu Tanaka, Komaki, JP;
Takeshi Mitsuoka, Konan, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A gas sensor element () includes a laminate of a detection element () and a heater (), and a porous protection layer () covering a forward end portion thereof. The laminate has a measuring chamber () into which a gas-to-be-measured is introduced via a diffusion resistor (). The porous protection layer includes an inner porous layer (), and an outer porous layer (). The inner porous layer has a higher porosity than the outer porous layer and the diffusion resistor. As viewed in a plurality of 100 μm×100 μm regions ato aand bto bon sections of the inner porous layer and the diffusion resistor, respectively, a pore diameter greater than the greatest pore diameter Cin the regions of the diffusion resistor exists in each of the regions of the inner porous layer.