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:
Feb. 25, 2014
Filed:
Oct. 17, 2008
Masaki Mizutani, Aichi, JP;
Shigeki Mori, Seki, JP;
Masaki Mizutani, Aichi, JP;
Shigeki Mori, Seki, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A gas sensor including a metal shell; a detection element main body held by the metal shell; a porous protection layer coated on a leading end portion of the detection element main body; and a protector including a side wall surrounding an element protruding portion of the detection element main body protruding from a leading end of the metal shell. The side wall has introduction holes formed therein which allow gas to be introduced. The porous protection layer includes a first portion; and a second portion provided on a base end side with respect to the first portion and having a progressively reduced thickness in a direction toward a leading end of the detection element. The second portion is disposed closer to the base end of the detection element than the introduction holes in the axial direction.